Nouns

(n)inka liquid used for printing or writing or drawing
(n)inkdark protective fluid ejected into the water by cuttlefish and other cephalopods

Verbs

(v)inkappend one's signature to“They inked the contract”
(v)inkmark, coat, cover, or stain with ink“he inked his finger”
(v)inkfill with ink“ink a pen”