fairly
adverb
1 all pupils were treated fairly:
justly, equitably, impartially, without bias, without prejudice, without fear or favour, with an open mind, open-mindedly, even-handedly, objectively, neutrally, disinterestedly;
properly, lawfully, legally, legitimately, licitly, by the book, in accordance with the rules, according to the rules;
equally, the same;
informal fairly and squarely.
▷antonyms unfairly.
fairly Oxford Dictionary of English