This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Possessing the property of reducing in size or significance.

v. Present participle of shrink.

a. & n. from shrink.

n. process or result of becoming less or smaller

n. the act of becoming less

"She recalled his shrinking from the boys, and his hasty refusal to go to the homestead."

shrink   

bashful    timid   

shrink   

blinking    drinking    linking    plinking    rethinking    sinking    stinking    thinking    unthinking    winking