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Webster 1913 Edition

adv.

In a stout manner; lustily; boldly; obstinately;

as, he

stoutly

defended himself

adv.

Lustily; boldly; obstinately. He stoutly defended himself.

stoutly ‎(comparative more stoutly, superlative most stoutly)

In a stout manner; lustily; boldly; obstinately.
He stoutly defended himself.