To earnest them [our arms] with men.
Pastor Fido (1602).
Ear"nest, n. [Prob. corrupted fr. F. arrhes, L. arra, arrha, arrhabo, Gr. 'arrabw`n, of Semitic origin, cf. Heb. rvn; or perh. fr. W. ernes, akin to Gael. earlas, perh. fr. L. arra. Cf. Arles, Earles penny.] 1. Something given, or a part paid beforehand, as a pledge; pledge; handsel; a token of what is to come.
Who hath also sealed us, and given the earnest of the Spirit in our hearts.