causing discouragement because difficult

frighten, alarm

to weaken the cottage, confidence, self-discipline etc of (e.g. an army)

depress, unnerve

to cause (a person) to be very sad

deject, make despondent; exhaust

cause (a person) to lose courage or confidence

depress, ruin one's hopes

to make (a person) afraid in order to force her or him to do something

frighten, threaten

to rule (people) unjustly or cruelly; to cause (a person) to feel troubled, uncomfortable

depress, subdue

(to cause a person) to feel sad

upset, depress

(to cause a person, animal) to become weary, in need of rest etc

exhaust, weary

to cause (a person) to lose self-control, power of decision, courage

upset, intimidate