Englishgentlemanly
adjective
the girls declined his gentlemanly offer to allow them to go first:
chivalrous, gallant, honourable, noble, courtly, courteous, civil, respectful, polite, well mannered, well bred, well behaved, attentive, gracious;
considerate, thoughtful, obliging, accommodating;
cultivated, cultured, civilized, polished, refined, suave, urbane;
dated mannerly;
archaic gentle.
▷antonyms rude; unbecoming.
gentlemanly Oxford Dictionary of English