形容詞 unemotional:

1. unsusceptible to or destitute of or showing no emotion
2. cool and formal in manner
   同義詞：reserved, restrained, reticent

1. Susan married a man who appeared to be unemotional and self-possessed but who turned out to have a soft centre.
   蘇珊嫁給了一個看起來冷漠有自制力的男人，可沒想到他原來是一個軟心腸呢。