The split tongue of a snake

(idiomatic) The characteristic of deceptiveness; duplicity; untruthfulness.

(idiomatic) The practice or characteristic of speaking to others in a harsh, critical, or insulting manner.

plural of tongue-twister

plural of tongue kiss

Appropriate control of one's words.

plural of tongue depressor

A long narrow smooth piece of wood designed to depress the tongue, to allow for examination of the rear of the oral cavity. / (less commonly) Any device used to depress the tongue.

garrulous, gossipy

(of a person) spiteful, malignant, rancorous