blow, breath, give up, cause to lose (life), seething, snuff

Boyd’s Bible Dictionary:

(boil). To boil (Ex. 16:23).

Concise Bible Dictionary:

“To boil,” from the Anglo-Saxon seothan (Ex. 16:23; etc.).
 
Seething Milk

Strong’s Dictionary of Hebrew Words:

Number:
5301 (find all occurrences in KJV Bible)
Transliteration:
naphach
Phonic:
naw-fakh’
Meaning:
a primitive root; to puff, in various applications (literally, to inflate, blow hard, scatter, kindle, expire; figuratively, to disesteem)
KJV Usage:
blow, breath, give up, cause to lose (life), seething, snuff