Other forms: engulfed, engulfing, engulfs
To engulf something is to swallow it up completely. Nothing left showing.
Fire, water and smoke are the usual subjects, and a building engulfed in flames is a standard phrase in news reporting. The word implies speed and totality together. It works on feelings too, and being engulfed by grief or panic means the feeling has taken over entirely. The noun behind it is gulf, meaning a deep chasm or bay, which is where the picture of being swallowed comes from.
1verbengulfTo surround and swallow something up completely.
“Flames engulfed the upper floor within minutes.”
From en- + gulf.
Etymology from Wiktionary, CC BY-SA