adverb, adjective, verb, directional, measure word · very or rather (colloquial degree adverb)

这个主意挺不错的。

measure word, adverb · measure word for machine guns

阵地上架着一挺机枪。

verb · straight, erect, or to physically straighten up or stick out a body part

他挺起胸膛向前走去。

verb · to support, endure, or hold out against difficulty

虽然任务艰巨，但我们必须挺住。