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. (人或話語) 不合適的; 不得體的[正式]

Austin displayed conduct unbecoming of an officer and a gentleman. 奧斯汀的行為不符合軍官和紳士的身份。