Answer:

ail

Answer	Crossword Clue
AIL	Feel crummy
AIL	Feel rotten
AIL	Have the blahs

AIL	Be sick
AIL	Feel bad
AIL	Feel lousy
AIL	Feel malaise
AIL	Have a bug
AIL	Have it bad
AIL	Have the miseries
AIL	Be a bit off

AIL	Be out of sorts
AIL	Feel off
AIL	Feel unwell
AIL	Have the flu
AIL	Trouble
AIL	Feel sick
AIL	Be in distress
AIL	Be down with something

AIL	Need to take a sick day
AIL	Plague
AIL	Have miseries
AIL	Be under the weather
AIL	Feel punk
AIL	Need a sawbones
AIL	Require curing
AIL	Suffer

AIL	Be on the blink
AIL	Feel poorly
AIL	Be ill
AIL	Weigh upon
AIL	Distress
AIL	Prey on the mind of (3)
AIL	Weigh heavily upon
AIL	Feel indisposed

AIL	Suffer symptoms
AIL	Have something
AIL	Affect badly
AIL	Afflict
AIL	Bother

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.