1. setius — de Vaan
setius 'later, to a lesser degree' [adj. o/a] (PL+) Pit. *seto-. PIE *seh r to- 'late, slow'. IE cognates: OIn sith- 'continuous', sithithir 'as long as', W. hydy Co. Bret, hes 'length' < *situ/i- 'length'; OE sld iong', OHG slto 'lax' < *s(e)h,-i-to-, OE sid, OS stth, OHG sid 'since' < *s(e)h,-i-to-. Setius can be regarded as an /o-derivative to an adj. *seto- Mate' or 4slow\ which may be formed from the same root … — [de Vaan, s.v. setius, p. 573]