Brown-Driver-Briggs (BDB)
H3960
H3960 לָשַׁן vb. denom . use the tongue , only specif. slander
Brown-Driver-Briggs Hebrew Lexicon (BDB), 1906 — public domain
Strong's H3960 · Hebrew
lashan
law-shan'
a primitive root; properly, to lick; but used only as a denominative from 3956; to wag the tongue, i.e. to calumniate