What does bastardus mean in Latin?

bastardus, a adjective, means “bastard (of illegitimate descent); impure”.

adjectivefirst/second-declension adjective

bastardus¹

bastardus (feminine bastarda, neuter bastardum)

singular
form	masculine	feminine	neuter
nominative	bastardus	bastarda	bastardum
genitive	bastardī	bastardae	bastardī
dative	bastardō	bastardae	bastardō
accusative	bastardum	bastardam	bastardum
ablative	bastardō	bastardā	bastardō
vocative	bastarde	bastarda	bastardum

plural
form	masculine	feminine	neuter
nominative	bastardī	bastardae	bastarda
genitive	bastardōrum	bastardārum	bastardōrum
dative	bastardīs	bastardīs	bastardīs
accusative	bastardōs	bastardās	bastarda
ablative	bastardīs	bastardīs	bastardīs
vocative	bastardī	bastardae	bastarda

Uncertain, perhaps from Frankish *bāst (“marriage”), or from Vulgar Latin bastum (“packsaddle”), thus a child born while travelling; see bastard.

Descendants

noun · masculinesecond declension

bastardus²

bastardus m (genitive bastardī)

Medieval Latinmasculinebastard
Filii legitimi bastardorum nobilium non debent deferre cognomen et arma ipsorum nobilium, nisi de licentia capitis illius generis.The legitimate sons of noble bastards must not pass on the surname and arms of those nobles, unless permitted by the head of their family.1430, Statuta Sabaudiae [Statutes of Savoy], book 3, chapter 3:

Uncertain, perhaps from Frankish *bāst (“marriage”), or from Vulgar Latin bastum (“packsaddle”), thus a child born while travelling; see bastard.