diff --git a/lib/src/english/DictEng.gf b/lib/src/english/DictEng.gf
index 109c7f51c..6ccfd64dd 100644
--- a/lib/src/english/DictEng.gf
+++ b/lib/src/english/DictEng.gf
@@ -41,6 +41,7 @@ lin ab_initio_Adv = mkAdv "ab initio";
 lin aback_Adv = mkAdv "aback";
 lin abacus_N = mkN "abacus" "abacuses";
 lin abaft_Adv = mkAdv "abaft";
+lin abaft_Prep = mkPrep "abaft";
 lin abandon_N = mkN "abandon" ;
 lin abandon_V2 = mkV2 (mkV "abandon" "abandons" "abandoned" "abandoned" "abandoning");
 lin abandoned_A = compoundA (mkA "abandoned");
@@ -648,6 +649,7 @@ lin aflame_A = compoundA (mkA "aflame");
 lin afloat_A = compoundA (mkA "afloat");
 lin afoot_A = compoundA (mkA "afoot");
 lin afore_Adv = mkAdv "afore";
+lin afore_Prep = mkPrep "afore";
 lin aforesaid_A = compoundA (mkA "aforesaid");
 lin aforethought_Adv = mkAdv "aforethought";
 lin afoul_Adv = mkAdv "afoul";
@@ -719,6 +721,7 @@ lin aggro_N = mkN "aggro" ;
 lin aghast_A = compoundA (mkA "aghast");
 lin agile_A = compoundA (mkA "agile");
 lin agility_N = mkN "agility" ;
+lin agin_Prep = mkPrep "agin";
 lin aging_N = mkN "aging" ;
 lin agitate_V = mkV "agitate" "agitates" "agitated" "agitated" "agitating";
 lin agitate_V2 = mkV2 (mkV "agitate" "agitates" "agitated" "agitated" "agitating");
@@ -1121,6 +1124,7 @@ lin amiable_A = compoundA (mkA "amiable");
 lin amicability_N = mkN "amicability" ;
 lin amicable_A = compoundA (mkA "amicable");
 lin amid_Prep = mkPrep "amid";
+lin amidst_Prep = mkPrep "amidst";
 lin amidships_Adv = mkAdv "amidships";
 lin amiens_PN = mkPN "Amiens";
 lin amir_N = mkN "amir" "amirs";
@@ -1238,6 +1242,7 @@ lin anecdotal_A = compoundA (mkA "anecdotal");
 lin anecdote_N = mkN "anecdote" "anecdotes";
 lin anemometer_N = mkN "anemometer" "anemometers";
 lin anemone_N = mkN "anemone" "anemones";
+lin anent_Prep = mkPrep "anent";
 lin aneroid_A = compoundA (mkA "aneroid");
 lin aneroid_N = mkN "aneroid" "aneroids";
 lin anesthetic_A = compoundA (mkA "anesthetic");
@@ -2651,6 +2656,7 @@ lin baptist_N = mkN "baptist" "baptists";
 lin baptize_V2 = mkV2 (mkV "baptize" "baptizes" "baptized" "baptized" "baptizing");
 lin bar_N = mkN "bar" "bars";
 lin bar_V2 = mkV2 (mkV "bar" "bars" "barred" "barred" "barring");
+lin bar_Prep = mkPrep "bar";
 lin baracaldo_PN = mkPN "Baracaldo";
 lin barb_N = mkN "barb" "barbs";
 lin barbadian_A = compoundA (mkA "barbadian");
@@ -3286,7 +3292,7 @@ lin bettor_N = mkN "bettor" "bettors";
 lin betty_PN = mkPN "Betty";
 lin between_Adv = mkAdv "between";
 lin between_Prep = mkPrep "between";
-lin betwixt_Adv = mkAdv "betwixt";
+lin betwixt_Prep = mkPrep "betwixt";
 lin bevel_N = mkN "bevel" "bevels";
 lin bevel_V2 = mkV2 (mkV "bevel" "bevels" "bevelled" "bevelled" "bevelling");
 lin beverage_N = mkN "beverage" "beverages";
@@ -6244,6 +6250,7 @@ lin cinquefoil_N = mkN "cinquefoil" "cinquefoils";
 lin cipher_N = mkN "cipher" "ciphers";
 lin cipher_V = mkV "cipher" "ciphers" "ciphered" "ciphered" "ciphering";
 lin cipher_V2 = mkV2 (mkV "cipher" "ciphers" "ciphered" "ciphered" "ciphering");
+lin circa_Prep = mkPrep "circa";
 lin circle_N = mkN "circle" "circles";
 lin circle_V = mkV "circle" "circles" "circled" "circled" "circling";
 lin circle_V2 = mkV2 (mkV "circle" "circles" "circled" "circled" "circling");
@@ -34055,6 +34062,7 @@ lin sin_N = mkN "sin" "sins";
 lin sin_V = mkV "sin" "sins" "sinned" "sinned" "sinning";
 lin since_Adv = mkAdv "since";
 lin since_Subj = mkSubj "since";
+lin since_Prep = mkPrep "since";
 lin sincere_A = compoundA (mkA "sincere");
 lin sincerity_N = mkN "sincerity" ;
 lin sine_N = mkN "sine" "sines";
@@ -39630,6 +39638,7 @@ lin twitch_V = mkV "twitch" "twitches" "twitched" "twitched" "twitching";
 lin twitch_V2 = mkV2 (mkV "twitch" "twitches" "twitched" "twitched" "twitching");
 lin twitter_N = mkN "twitter" "twitters";
 lin twitter_V = mkV "twitter" "twitters" "twittered" "twittered" "twittering";
+lin twixt_Prep = mkPrep "twixt";
 lin two_a_penny_A = compoundA (mkA "two-a-penny");
 lin two_edged_A = compoundA (mkA "two-edged");
 lin two_faced_A = compoundA (mkA "two-faced");
@@ -42177,6 +42186,7 @@ lin whiff_N = mkN "whiff" "whiffs";
 lin whig_N = mkN "whig" "whigs";
 lin while_N = mkN "while" "whiles";
 lin while_Subj = mkSubj "while";
+lin whilst_Subj = mkSubj "whilst";
 lin while_V2 = mkV2 (mkV "while" "whiles" "whiled" "whiled" "whiling");
 lin whim_N = mkN "whim" "whims";
 lin whimper_N = mkN "whimper" "whimpers";
diff --git a/lib/src/english/DictEngAbs.gf b/lib/src/english/DictEngAbs.gf
index 52ea8acc5..41fb3a006 100644
--- a/lib/src/english/DictEngAbs.gf
+++ b/lib/src/english/DictEngAbs.gf
@@ -36,6 +36,7 @@ fun ab_initio_Adv : Adv;
 fun aback_Adv : Adv;
 fun abacus_N : N;
 fun abaft_Adv : Adv;
+fun abaft_Prep : Prep;
 fun abandon_N : N;
 fun abandon_V2 : V2;
 fun abandoned_A : A;
@@ -643,6 +644,7 @@ fun aflame_A : A;
 fun afloat_A : A;
 fun afoot_A : A;
 fun afore_Adv : Adv;
+fun afore_Prep : Prep;
 fun aforesaid_A : A;
 fun aforethought_Adv : Adv;
 fun afoul_Adv : Adv;
@@ -714,6 +716,7 @@ fun aggro_N : N;
 fun aghast_A : A;
 fun agile_A : A;
 fun agility_N : N;
+fun agin_Prep : Prep ;
 fun aging_N : N;
 fun agitate_V : V;
 fun agitate_V2 : V2;
@@ -1116,6 +1119,7 @@ fun amiable_A : A;
 fun amicability_N : N;
 fun amicable_A : A;
 fun amid_Prep : Prep ;
+fun amidst_Prep : Prep;
 fun amidships_Adv : Adv;
 fun amiens_PN : PN;
 fun amir_N : N;
@@ -1233,6 +1237,7 @@ fun anecdotal_A : A;
 fun anecdote_N : N;
 fun anemometer_N : N;
 fun anemone_N : N;
+fun anent_Prep : Prep;
 fun aneroid_A : A;
 fun aneroid_N : N;
 fun anesthetic_A : A;
@@ -2646,6 +2651,7 @@ fun baptist_N : N;
 fun baptize_V2 : V2;
 fun bar_N : N;
 fun bar_V2 : V2;
+fun bar_Prep : Prep;
 fun baracaldo_PN : PN;
 fun barb_N : N;
 fun barbadian_A : A;
@@ -3280,8 +3286,8 @@ fun betterment_N : N;
 fun bettor_N : N;
 fun betty_PN : PN;
 fun between_Adv : Adv;
-fun between_Prep : Prep ;
-fun betwixt_Adv : Adv;
+fun between_Prep : Prep;
+fun betwixt_Prep : Prep;
 fun bevel_N : N;
 fun bevel_V2 : V2;
 fun beverage_N : N;
@@ -6228,6 +6234,7 @@ fun cinquefoil_N : N;
 fun cipher_N : N;
 fun cipher_V : V;
 fun cipher_V2 : V2;
+fun circa_Prep : Prep;
 fun circle_N : N;
 fun circle_V : V;
 fun circle_V2 : V2;
@@ -34000,7 +34007,8 @@ fun simultaneousness_N : N;
 fun sin_N : N;
 fun sin_V : V;
 fun since_Adv : Adv;
-fun since_Subj : Subj ;
+fun since_Subj : Subj;
+fun since_Prep : Prep;
 fun sincere_A : A;
 fun sincerity_N : N;
 fun sine_N : N;
@@ -39571,6 +39579,7 @@ fun twitch_V : V;
 fun twitch_V2 : V2;
 fun twitter_N : N;
 fun twitter_V : V;
+fun twixt_Prep : Prep;
 fun two_a_penny_A : A;
 fun two_edged_A : A;
 fun two_faced_A : A;
@@ -42118,6 +42127,7 @@ fun whiff_N : N;
 fun whig_N : N;
 fun while_N : N;
 fun while_Subj : Subj;
+fun whilst_Subj : Subj;
 fun while_V2 : V2;
 fun whim_N : N;
 fun whimper_N : N;