[ swīðhwæt] very active, Run 5.

[ swīðhycgende] (i) † bold-minded.

[ swīðian] to become strong: prevail: fix.

[ swīðlic] intense, excessive, severe, violent, Æ: immense, Æ: effective. adv. -līce, AO, CP.

[ swīðlicnes] f. excess, RBL 737.

[ swīðmihtig] very mighty, PPs 8513.

[ swīðmōd] stout-hearted, brave: insolent, arrogant.

[ swīðmōdnes] f. magnanimity.

[ swīðnes] f. excess, violence, CM 458.

[ swīðor] comp. of [swīðe].