nightish

From Middle English nyghtyssh, equivalent to night +‎ -ish.

nightish (comparative more nightish, superlative most nightish)

1. Of or pertaining to night; nocturnal.
   • c. 1565-1570, George Turberville, A Lover's Vow

     When hawks shall dread the silly fowl, / And men esteem the nightish owl —

   • 1989, Edward Taylor, Donald E. Stanford, The Poems of Edward Taylor:

     Star light's nights twinkling. Moonlight is nightish, Sun makes day: […]

   • 1998, Robert McLiam Wilson, Ripley Bogle:

     Nightish folk working their sleepingcity functions in the bright squares of office windows. People untouched by day, smugly snug. You wonder at this darker world of theirs. You grow querulous and bewildered.

• nightly

• thingish