Every afternoon he frowsts by the window, brooding over the letters he never sent.

We frowsted in the stuffy parlor all afternoon, unwilling to open the windows.

After a week without ventilation, the basement felt frowstier than before.

The frowstiness of the closed attic made everyone step outside for a breath of fresh air.

Of all the rooms in the old manor, the attic was the frowstiest, thick with dust and the scent of mildewed books.

She fidgeted frowsily on the old sofa as she waited for the phone to ring.

The frowsty attic was filled with boxes of forgotten toys and a faint scent of mildew.

After weeks on the road without laundry, her suitcase contained the frowsiest clothes I've ever seen.

After three sleepless nights, his apartment grew frowsier and harder to relax in.

Every time she frowses at the news, the rest of the room falls silent.