mannerly

Etymology
From, equivalent to.

Adjective

 * 1) Polite, having good manners.
 * 2) * 1861, Charlotte Yonge, The Young Step-Mother
 * ...but Genevieve's laugh roused her again, partly because she thought it less mannerly than accorded with the girl's usual politeness.
 * ...but Genevieve's laugh roused her again, partly because she thought it less mannerly than accorded with the girl's usual politeness.

Adverb

 * 1) Politely; with good manners.