mṛ́ṣā ind. in vain, uselessly, to no purpose, [RV.] &c. &c.
wrongly, falsely, feignedly, lyingly, [AV.] &c. &c. (with √ kṛ, to feign; with √ jñā or man, to consider false or untrue; mṛṣaiva tat, that is wrong; varanīyam mṛṣā budhaiḥ, untruthfulness is to be avoided by the wise)
‘Untruth’ personified as the wife of A-dharma, [BhP.]