nondescript - a. 莫可名状的,难以区别的,无特徵的; n. 难以名状,不属任何型类的人;

• So they tend to run pictures of distinctive looking people more often than of people with a nondescript appearance.
• He wore nondescriptive clothes for the party.
• There is quite a bit of undergrowth, largely birch and ash saplings plus nondescript bushes of various sorts.