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.