unbecoming

1. ADJ If you describe things such as clothes as unbecoming, you mean that they look unattractive. (衣服)不好看的[老式]

2. ADJ If you describe a person's behaviour or remarks as unbecoming, you mean that they are shocking and unsuitable for that person. (人或话语) 不合适的; 不得体的[正式]

Austin displayed conduct unbecoming of an officer and a gentleman. 奥斯汀的行为不符合军官和绅士的身份。