Webster's Revised Unabridged Dictionary · 1913

Earnest

Earnest (ẽr"nest) , noun

[Anglo-Saxon eornost, eornest; akin to Old High German ernust, German ernst; compare Icelandic orrosta battle, perh. akin to Greek 'orny`nai to excite, Latin oriri to rise.]

Seriousness; reality; fixed determination; eagerness; intentness.
Take heed that this jest do not one day turn to earnest. — Sir P. Sidney
And given in earnest what I begged in jest. — Shakespeare
Collocations (1)
In earnest , serious; seriously; not in jest; earnestly.

Earnest , adjective

1.
Ardent in the pursuit of an object; eager to obtain or do; zealous with sincerity; with hearty endeavor; heartfelt; fervent; hearty; -- used in a good sense; as, earnest prayers.
An earnest advocate to plead for him. — Shakespeare
2.
Intent; fixed closely; as, earnest attention.
3.
Serious; important. [Obsolete]
They whom earnest lets do often hinder. — Hooker

Earnest , transitive verb

To use in earnest. [Rare]
To earnest them [our arms] with men. — Pastor Fido (1602)

Earnest , noun

[Probably corrupted from French arrhes, Latin arra, arrha, arrhabo, Greek 'arrabw`n, of Semitic origin, compare Hebrew ērāvōn; or perh. from Welsh ernes, akin to Gael. earlas, perh. from Latin arra. Compare 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. — 2 Cor. i. 22
And from his coffers Received the golden earnest of our death. — Shakespeare
2.
(Law) Something of value given by the buyer to the seller, by way of token or pledge, to bind the bargain and prove the sale. — Kent. Ayliffe. Benjamin
Collocations (1)
Earnest money (Law) , money paid as earnest, to bind a bargain or to ratify and prove a sale.