Some people prefer not to use the feminine form 'actress' and use the word 'actor' for both sexes.
有些人不喜欢使用actress这一阴性形式，而用actor一词代表两个性别。
《牛津词典》
2
The two characters form a single word, they cannot be separated.
这两个字构成一个词，不能拆开。
《新英汉大辞典》
3
For instance, subjects are given three words such as "age", "mile" and "sand"—and asked to come up with a single word that can precede or follow each of them to form a compound word.