fight tooth and claw

fight tooth and claw/nail

to fight very hard to achieve something (often + to do sth) We fought tooth and nail to retain our share of the business.

Name	Pronounced	Usage
Appleby	['æplbi]
Bryce	[brais]
Louhi	-	Finnish Mythology
Proinsias	-	Irish
Hrothgar	-	Anglo-Saxon (Latinized)
Iudicael	-	Ancient Celtic