Lexical Definition

‎προθυμία‎ prothymía (proth-oo-mee'-ah) eagerness ^G:N-F
from ‎πρόθυμος‎

forwardness of mind, readiness (of mind), ready (willing) mind.

• predisposition, i.e. alacrity

Abbott-Smith

** προθυμία, -ας, ἡ (< πρόθυμος), [in LXX: Si 45:23*;]
eagerness, willingness, readiness: Ac 17:11, II Co 8:11, 12, 19 9:2.†

Abbott-Smith References

Liddell-Scott-Jones

προθυμία-ία,

Ionic dialect -ιη, ἡ, readiness, willingness, eagerness, ᾗσι προθυμίῃσι [ῑ] pepoiqw/s [Refs 8th c.BC+]; opposed to ἀθυμία, [Refs 5th c.BC+]; πάσῃ π. with all zeal, [Refs 5th c.BC+]; ὑπὸ προθυμίας by my eagerness, [Refs 5th c.BC+]

__2 with genitive person, ἐκ τῆς Κλεομένεος π. at his desire, [Refs 5th c.BC+]; κατὰ τὴν τούτου π. as far as his desire goes, [Refs 5th c.BC+]; τοῦ θεοῦ προθυμίᾳ by the will of the god, [Refs 5th c.BC+]
__3 with genitive objecti, πᾶσαν π. σωτηρίης.. παρεχόμενοι showing the utmost zeal to save it, [Refs 5th c.BC+]; π. ἔργου readiness for action, will or purpose to act, [Refs 5th c.BC+]
__4 π. ἔχειν, ={προθυμεῖσθαι}, [Refs 5th c.BC+]. infinitive, ἔσχε π. στρατεύσασθαι [Refs 5th c.BC+]: also with participle, ἔφη πᾶσαν π. σχεῖν δεόμενος [Refs]
__II goodwill, ready kindness, Ἑλλήνων εἵνεκα ἔργον.. ἔργασμαι ὑπὸ προθυμίης [Refs 5th c.BC+]; πλείστην π. περὶ ὑμᾶς, π. πολλὴν περί σε, [Refs 5th c.BC+]
__III desire of natural functions, [Refs 1st c.AD+]