from
The Collaborative International Dictionary of English v.0.48
Throe \Throe\, n. [OE. [thorn]rowe, [thorn]rawe, AS.
[thorn]re['a] a threatening, oppression, suffering, perhaps
influenced by Icel. [thorn]r[=a] a throe, a pang, a longing;
cf. AS. [thorn]reowian to suffer.]
1. Extreme pain; violent pang; anguish; agony; especially,
one of the pangs of travail in childbirth, or purturition.
[1913 Webster]
Prodogious motion felt, and rueful throes. --Milton.
[1913 Webster]
2. A tool for splitting wood into shingles; a frow.
[1913 Webster]