Both forms are derived from the PIE root *' (late *') based on close matches with past tense forms of Sanskrit "yā́ti" 'he goes, travels' (cf. imperfect "áyāt", perfect "yayáu", and aorist "áyāsam"). The root is regarded as an iterative-intensive derivative of the more common *' 'to go' (present *'). One reflex of *"" is Latin "īre" 'to go' (present "eō" 'I go') which gave many English words such as amb"ition", ex"it", intro"it", issue, preter"ite", and so forth. It is also found in the Slavic languages as "iti" and similar forms.