I felt ill at ease in such formal clothes.

我穿着这样正式的衣服觉得很拘谨。

《牛津词典》

Ease of care was most important: summer dresses and outfits, in particular, were chiefly cotton, readily capable of being washed and pressed at home.

易于打理是最重要的：尤其是夏装和套装，大都是棉质的，很容易在家清洗和熨烫。

youdao

The boy rose, and stood at graceful ease, but with an aspect of concern in his face.

男孩站起来，文雅从容地站着，脸上却流露出焦虑的神色。

youdao

It also organizes programs to help foreign students feel more at ease in their new surroundings.

VOA: special.2009.03.19

Not everyone in the military, however,is at ease with social media.

VOA: special.2009.09.14

Late in the afternoon, the people in our neighborhood, who had all been feeling ill at ease, gathered in the dimness of our house to share a meal.

CNN: 'The Rose': Living after Japan's disaster

Nowhere was this fear more palpable than in France, a country not fully at ease with its own sad performance in World War II.

FORBES: Leadership

Ms. Moore and other senior photographers try to put teens at ease in front of the camera.

WSJ: Best High-School Pictures Ever