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late 14c., from Old French furet, diminutive of fuiron "weasel, ferret," literally "thief," probably from Late Latin furionem (related to furonem "cat," also "robber"), from Latin fur (genitive furis) "thief."
early 15c., from ferret (n.), in reference to the use of half-tame ferrets to kill rats and flush rabbits from burrows; the extended sense of "search out, discover" is 1570s. Related: Ferreted; ferreting.
To search inquisitively; find by searching: ferret out the whole story
[1570+; fr the notion of the ferret as a restless and assiduous searcher]
Lev. 11:30 (R.V., "gecko"), one of the unclean creeping things. It was perhaps the Lacerta gecko which was intended by the Hebrew word (anakah, a cry, "mourning," the creature which groans) here used, i.e., the "fan-footed" lizard, the gecko which makes a mournful wail. The LXX. translate it by a word meaning "shrew-mouse," of which there are three species in Palestine. The Rabbinical writers regard it as the hedgehog. The translation of the Revised Version is to be preferred.