Fromsinus +‎-y.

sinusy (comparativemoresinusy,superlativemostsinusy)

1. Resembling or characteristic of thesinuses.
   • 2001, Jonathan Franzen,The Corrections:

     Sleep eluded even Alfred. Eachsinusy gasp of Enid’s seemed to pierce his ear the instant he was poised afresh to drop off.

• sinussy

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