A — 1: αἰφνίδιος
(Strong's #160 — Adjective — aiphnidios — aheef-nid'-ee-os )

"sudden," occurs in 1—Thessalonians 5:3 , where it has the place of emphasis at the beginning of the sentence, as olethros, "destruction," which the adjective qualifies, has at the end; in Luke 21:34 , it is used adverbially, RV, "suddenly" (AV, "unawares"). See UNAWARES.

B — 1: ἄφνω
(Strong's #869 — Adverb — aphno — af'-no )

"suddenly," occurs in Acts 2:2; 16:26; 28:6 .

B — 2: ἐξαίφνης
(Strong's #1810 — Adverb — exaiphnes — ex-ah'eef-nace )

a strengthened form, akin to No. 1, occurs in Mark 13:36; Luke 2:13; 9:39; Acts 9:3; 22:6 .

B — 3: ἐξάπινα
(Strong's #1819 — Adverb — exapina — ex-ap'-ee-nah )

a later form of No. 2, occurs in Mark 9:8 .

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