sincere adj.
VERBS be, look, seem, sound
ADV. deeply, really, very the warm, deeply sincere note in her voice | completely, entirely, perfectly, quite, utterly, wholly | enough Her protests seemed sincere enough.
PREP. about his refusal to be sincere about his feelings | in Have they been sincere in their efforts to resolve the crisis?
You can also check other dicts: sincere (English, 中文解释 ), wordnet sense, Collins Definition