Answer:
The root word in unhappy is "happy"
'un' is the prexix
Explanation:
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(Mark Logan's as Brainliest) ;)
1. Cope, treat, control, handle, treat
2. trouble, worry, dilemma
3. Relax, unwind, rest, unlax
4. Healthy, healthful
5. Adequate, abundant, decent, sufficing
6. Daily, day-to-day, often, periodically, regularly, regular, routinely
7. belittle, criticize, slam, slander,
8. abounding, bounteous, bountiful, countless, innumerable, plentiful
9. Cramped, inflexible, solid, rigid, stiff, tense, tightened
10. Depressed, morose, pessimistic, unhappy, blue, destroyed, dispirited, down, dragged low, bad, cast-down, glum, grim, let-down, low-spirited, woebegone
11. Afraid, anxious, panicky, startled, petrified, shaken, terrified, aghast, panic-stricken, terror-stricken
12. Fatigue, weariness, debilitation, enervation, expenditure, feebleness, lassitude, prostration