Intenerate

v. t. [imp. & p. p. INTENERATED; p. pr. & vb. n. INTENERATING.] [Lat. in and tener, soft, tender; It. intenerire.] To make tender; to soften. [Rare.]

Autumn vigor gives Equal, intenerating, milky grain. Philips.

So have I seen the little pearls of a spring sweat through the bottom of a bank, and intenerate the stubborn pavement. Bp. Taylor.