köken: Inherited from Old Armenian կամաց (kamacʻ), dative case of կամք (kamkʻ, “will, desire”). Thus, the word literally means “according to one’s desire, without compulsion”, from which the sense of “slowly” and others developed.
köken: From Proto-Indo-Aryan *tuHṣṇíHm, from Proto-Indo-Iranian *tuHšníHm, from Proto-Indo-European *tuh₂s-n-, from *teh₂ws- (“to be quiet, be still”), itself perhaps from *tews- (“to be happy”). Cognate with Avestan 𐬙𐬎𐬱𐬥𐬌̣𐬱𐬀𐬛- (tušnịšad-), Danish tyst (“quiet”), Old Prussian tusnan (“still”), Luwian 𒌅𒄷𒅆𒀀𒄿 (tuḫušiya-, “to await, to wait and see”), and Proto-Celtic *tausos (“deaf”).