Like or characteristic of or befitting a sister:
— Sisterly kindness.

synonyms: sisterlike, sororal.

Roget 906: benevolent; kind, kindly; well-meaning; amiable; obliging, accommodating, indulgent, gracious, complacent, good-humored.    warm-hearted, kind-hearted, tender-hearted, large-hearted, broad-hearted; merciful etc. 914; charitable, beneficent, humane, benignant; bounteous, bountiful.    good-natured, well-natured; spleenless^†; sympathizing, sympathetic; complaisant etc. (courteous) 894; well-meant, well-intentioned.    fatherly, motherly, brotherly, sisterly; paternal, maternal, fraternal; sororal^†; friendly etc. 888.    ... show more

Dutch: zusterlijk
Polish: siostrzany