sickish

From sick +‎ -ish.

sickish (comparative more sickish, superlative most sickish)

1. Somewhat sick, but not seriously so.
   • 1863, J[oseph] Sheridan Le Fanu, “Dreams and Troubles, and a Dark Look-out”, in The House by the Church-yard. […], volume II, London: Tinsley, Brothers, […], →OCLC, page 35:

     [W]hen an unexpected bankruptcy was announced by Cluffe or Toole in the Club-room, it made his ear ring like a slap, and he felt sickish for half an hour after.

   • 1990, Stephen King, The Moving Finger:

     His heart was thumping harder than ever, and it was impossible to tell if the sickish, pukey feeling deep down in his belly was relief or terror.

• out of sorts, poorly, unwell

• malaise