Czech spát

← Proto-Indo-European *swep- (root)

← Proto-Indo-European *swep- (inherited)

← Proto-Slavic *sъpati (inherited)

← Old Czech spáti (inherited)

→ Czech zaspat (prefix)

→ Czech spinkat (affix)

→ Czech spáč (affix)

→ Czech sedmispáč (affix)

→ Czech spací (affix)

→ Czech nespavý (affix)

→ Serbo-Croatian spati (cognate)