From The Collaborative International Dictionary of English v.0.48:
Noursle \Nour"sle\, v. t. [Freq., fr. OE. nourse. See Nurse.]
To nurse; to rear; to bring up. [Obs.] [Written also nosel,
nousel, nousle, nowsle, nusle, nuzzle, etc.]
She noursled him till years he raught. --Spenser.