Proto-IE: *sēk(')-
Meaning: slow, quiet
Old Greek: hom. [ē̂]ka `still, leise, sacht, schwach, langsam'; comp. hḗssōn, att. hḗttōn `schwächer, geringer', hē̂ssa, att. hē̂tta, gen -ǟs f. 'defeat, discomfilure'; akalá-rroo-, akala-rrẹ̄́tǟ-s `sanft fliessend ?', akalós = hēsükhós, malakós Hsch.; adv. ákaska, akaskā̂i̯ `sanft, ruhig', akéōn, -éọ̄sa `schweigend, stumm', adv. akǟ́n, akǟ̂ `id.'
Latin: sēgnis, -e `langsam, schläfrig, träge'
Russ. meaning: медленный, спокойный