Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ē-mīror, āri, v. dep. a. (qs. ex intimo animo demiror), to wonder greatly at (very rare): aequora, Hor. C. 1, 5, 8 Orell. N. cr.; so App. M. 4, p. 274 Oud. N. cr. (al. miratus); Placid. p. 251 Munck.