"Suitable for someone" 可以用 "appropriate for someone" 或者 "fit for someone" 表示。这两个词都来自英语。
例句：
This job is not appropriate for someone with pmited experience. (这份工作对于经验有限的人来说不合适。) This shirt is a good fit for someone with a spm build. (这件衬衫对于身材瘦弱的人很合适。)