to testify

from μάρτυς; to be a witness, i.e. testify (literally or figuratively):--charge, give (evidence), bear record, have (obtain, of) good (honest) report, be well reported of, testify, give (have) testimony, (be, bear, give, obtain) witness.

middle voice from μάρτυς; to be adduced as a witness, i.e. (figuratively) to obtest (in affirmation or exhortation):--take to record, testify.