UNDERSTUDY
Un"der*stud`y, n.

Defn: One who studies another's part with a view to assuming it in an emergency.

UNDERSUIT
Un"der*suit`, n.

Defn: A suit worn under another suit; a suit of underclothes.

UNDERTAKABLE
Un`der*tak"a*ble, a.

Defn: Capable of being undertaken; practicable.

UNDERTAKE Un`der*take", v. t. [imp. Undertook; p. p. Undertaken; p. pr. & vb. n. Undertaking.] Etym: [Under + take.]

1. To take upon one's self; to engage in; to enter upon; to take in hand; to begin to perform; to set about; to attempt. To second, or oppose, or undertake The perilous attempt. Milton.

2. Specifically, to take upon one's self solemnly or expressly; to lay one's self under obligation, or to enter into stipulations, to perform or to execute; to covenant; to contract. I 'll undertake to land them on our coast. Shak.

3. Hence, to guarantee; to promise; to affirm.
And he was not right fat, I undertake. Dryden.
And those two counties I will undertake Your grace shall well and
quietly enjoiy. Shak.
I dare undertake they will not lose their labor. Woodward.