1. to scrape or grate: to tickle : metaphorically, of love, to nettle, chafe, irritate , (Herdotus Historicus); of satiety, (Pindar); of anxiety, (Herdotus Historicus), etc.; οὐ κνίσω τὸ ῥῆμ᾽ ἕκαστον will not attack every word, (Aristophanes Comicus):—;Pass. κνίζεσθαί τινος to be stung (with love) for one, (Theocritus Poeta Bucolicus)

2. κν. ὀργάν to provoke anger, (Pindar) (ML)