peynt-
“to paint, decorate with color”paint, picture, pigment, depict
Root yielding Latin pingere, English paint, picture, pigment, depict.
Discussion
The PIE root *peynt- (to paint, to decorate with colour, to ornament) produced the vocabulary of visual decoration and colouring — one of the few PIE roots that directly addresses the visual arts.
Latin pingere (to paint, to depict, to embroider) continues the root and gave English: paint (via Old French peindre from Latin pingere), picture (pictūra, "a painting"), depict (dē-pingere, "to paint thoroughly" — to represent visually), pigment (pigmentum, "colouring material"), and Pict (the "painted people" — the Celtic inhabitants of Scotland whom the Romans named for their body decoration).
The past participle pictus ("painted") is the more productive form in English: picturesque (worthy of being painted), pictorial (pertaining to pictures), and pictograph (a painted/drawn sign).
Sanskrit piṃśáti ("he adorns, he decorates") preserves the Indo-Iranian reflex.
The root is notable for being one of the very few PIE roots specifically addressing colour and visual art. Most PIE colour vocabulary derives from roots for brightness (*lewk-), shininess (*ǵʰel-), or specific substances (blood-red, sky-blue). The existence of *peynt- suggests the PIE speakers practised intentional decoration — body painting, textile dyeing, or surface ornamentation — at a level that warranted dedicated vocabulary.