ENIt is argued that the original meaning of Hittite ninink- is ‘to move, approach’. The Hittite verb is related to Lith. ap-nìkti ‘to assault, beset’, į-nìkti ‘to get down to, engage, attack’, OCS po-niknǫti ‘to droop’ and Greek νεῖκος ‘quarrel, strife, feud’ and goes back to PIE *neik-, meaning ‘to approach energetically’ or similar. Since Lat. nītor is semantically quite close to the Balto-Slavic verbs and is formally comparable, it is very likely that nītor also belongs to this root.