Webster’s Revised Unabridged Dictionary · 1913
Depone
De·pone′ (dē·pōn′), v. t. [imp. & p. p. Deponed (-pōnd′); p. pr. & vb. n. Deponing.] [L. deponere, depositum, to put down, in LL., to assert under oath; de- + ponere to put, place. See Position, and cf. Deposit.] 1. To lay, as a stake; to wager. [Obs.] Hudibras.
2. To lay down. [R.] Southey.
3. To assert under oath; to depose. [A Scotticism]
Sprot deponeth that he entered himself thereafter in conference. State Trials.
De·pone′, v. i. To testify under oath; to depose; to bear witness. [A Scotticism]
The fairy Glorians, whose credibility on this point can not be called in question, depones to the confinement of Merlin in a tree. Dunlop.