apropos
词形变化：
动词过去式: aproned | 动词过去分词: aproned | 动词现在分词: aproning | 动词第三人称单数: aprons |
同义词：
relevant | acceptable | incidentally | by the way | appropriate | correct | right | seemly | suitable | about | concerning | in connection with | in relation to | on the subject of | regarding | in passing | in this regard | by the bye | well-timed | seasonably | timely |
反义词：
词义辨析：
同义参见:
acceptable
relevant