Brown-Driver-Briggs (BDB)
H2151a
H2151a זָלַל shake H2151b זָלַל . be light , worthless . make light of
Brown-Driver-Briggs Hebrew Lexicon (BDB), 1906 — public domain
Strong's H2151 · Hebrew
zalal
zaw-lal'
a primitive root (compare 2107); to shake (as in the wind), i.e. to quake; figuratively, to be loose morally, worthless or prodigal