na-adjective
Describes a perspective or action based on practical benefit or utility, often in philosophical or evaluative contexts.
彼の考え方はとても功利的だ。
His way of thinking is very utilitarian.
功利的な判断だけでは、人間関係はうまくいかない。
Relationships don't go well if you only make utilitarian judgments.
功利主義 is the noun for 'utilitarianism' as a doctrine; 功利的 is the adjectival form describing something as utilitarian.
Compound of 功利 (こうり, 'utility') + 的 (てき, '-like, -tic'). 功利 is itself a Sino-Japanese word combining 功 (achievement, merit) and 利 (profit, benefit).