Forthwith

Vine's Expository Dictionary of NT Words

1: Ἐξαυτῆς (Strong'S #1824 — Adverb — exautes — ex-ow'-tace )

"at once" (from, ek, "out of," and autes, the genitive case of autos, "self or very," agreeing with "hour" understood, i.e., "from that very hour"), is translated "forthwith" in the RV in  Mark 6:25 (AV, "by and by");   Acts 10:33 (AV, "immediately"); 11:11 (ditto); 21:32 (ditto); 23:30 (AV, "straightway");   Philippians 2:23 (AV, "presently"). The word is frequent in the period of the koine Greek (see Preface). See Immediately , Presently , Straightway.

2: Εὐθέως (Strong'S #2112 — Adverb — eutheos — yoo-theh'-oce )

"at once, straightway" (from the adjective, euthus, "straight"), is translated "forthwith," in the AV of  Matthew 13:5;  26:49; (it occurs in some mss. in  Mark 5:13; the RV omits it);  Acts 12:10;  21:30 (RV, "straightway," in each place). See Immediately , Shortly , Straightway.

3: Εὐθύς (Strong'S #2117 — Adjective — euthus — yoo-thoos' )

an alternative adverb to No. 2, is translated "forthwith" in the AV of  Mark 1:29;  1:43 (in the best mss.), and   John 19:34 (RV, "straightway"). See Anon , Immediately , Straightway. Note: Parachrema, a synonymous word denoting "instantly, on the spot," is not translated "forthwith" in AV or RV. See Immediately.

Webster's Dictionary

(1): ( adv.) As soon as the thing required may be done by reasonable exertion confined to that object.

(2): ( adv.) Immediately; without delay; directly.

King James Dictionary

FORTHWITH', adv. forth and with. Immediately there fell from his eyes as it had been scales and he received his sight forthwith.  Acts 9 .