拙劣的（形容词，法语）

(adjective, FRENCH) Clumsy; inappropriate.

EXAMPLE: My belligerent brother seldom gets invited to parties because he always makes quite maladroit comments about the music, the food, and the party hosts.

我的咄咄逼人的兄弟很少被邀请参加聚会，因为他总是对音乐、食物和聚会的主办人发表非常拙劣的评论。

守口如瓶（成语）

（IDIOM）An interjection assuring the listener that you will reveal no secrets.

EXAMPLE: When my brother told me his secret plan for a new business, I told him "my lips are sealed" and he knew he could trust me.

当我的兄弟把他的新商业秘密计划告诉我时，我对他说：“我会守口如瓶。”他知道，他可以信任我。