regredior
Regredior is a Latin deponent verb of the third conjugation meaning “to go back, return, retreat.” As a deponent, it has active meaning while its forms are passive in form. Its principal parts are regredior, regredi, regressus sum. The infinitive is regredi, and the perfect participle is regressus sum. In ordinary usage, verbs of this class are conjugated with passive endings, even though they translate actively.
Usage and range of meaning include returning to a place previously left, retreating from action, or returning
Cognates in English include regress, regression, and progressive forms that derive from the same Latin root.
See also: regressor (in English usage), regression, regredi.