Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
expulso, āvi, ātum, 1, v. freq. a. [expello], to drive out, to expel (post-Aug. and very rare): si me (i. e. pilam) nobilibus scis expulsare sinistris, Sum tua, to drive from one’s self, drive back, Mart. 14, 46, 1; cf.: expulsim: Seleucia per duces expulsata, qs. driven out of its seat, i. e. overcome, subdued, Amm. 23, 6, 24.