Sentence:  If thou doſt marry, Ile giue thee / This plague to thy dowry: / Be thou as chaſte as <WSD>yce</WSD>, as pure as ſnowe, / Thou ſhalt not ſcape calumny, to a Nunnery goe. 
Meaning of the word marked with <WSD> tags:  Water in frozen (solid) form.