Illegitimate.

From Shakespeare's Troilus and Cressida, Act V, Scene VII ...

Enter MARGARELON.

Margarelon:  Turn, slave, and fight.

Thersites:  What art thou?         

Margarelon:  A bastard son of Priam’s.

Thersites:  I am a bastard too; I love bastards: I am a bastard begot, bastard instructed, bastard in mind, bastard in valour, in every thing illegitimate. One bear will not bite another, and wherefore should one bastard? Take heed, the quarrel’s most ominous to us: if the son of a whore fight for a whore, he tempts judgment. Farewell, bastard.  [Exit.

Margarelon:  The devil take thee, coward!  [Exit.

Sean Bean's pronunciation ...