Lexical Definition

‎תָּפֵל‎ tâphêl (taw-fale') insipid ^H:A
from an unused root meaning to smear

foolish things, unsavoury, untempered.

• plaster (as gummy) or slime
• (figuratively) frivolity

adj
1) foolish, insipid
2) (BDB) tasteless, unseasoned
n m
3) whitewash
2a) meaning uncertain

See Greek: ἀφροσύνη

Brown-Driver-Briggs

I. ‎תָּפֵל‎ adjective tasteless, unseasoned; — absolute ‎׳‎‎ת‎, as substantive Job 6:6 figurative of unsatisfying prophecies Lam 2:14 ( + ‎שָׁוְא‎).

II. ‎תָּפֵל‎ noun [masculine] whitewash; — applied to wall, in Ezekiel's vision Ezek 13:10; Ezek 13:11; Ezek 13:14; Ezek 13:15 figurative of false prophet Ezek 22:28.

Brown-Driver-Briggs References