adj. 25B6; adjective
very congenial people : LIKE-MINDED, compatible, kindred, well suited; companionable, sociable, sympathetic, comradely, convivial, hospitable, genial, personable, agreeable, friendly, pleasant, likeable, amiable, nice.
a congenial environment : PLEASANT, pleasing, agreeable, enjoyable, pleasurable, nice, appealing, satisfying, gratifying, delightful, relaxing, welcoming, hospitable; suitable, well suited, favourable.
unpleasant.