吃力

to entail strenuous effort / to toil at a task / strenuous / laborious / strain

to eat / to consume / to eat at (a cafeteria etc) / to eradicate / to destroy / to absorb / to suffer / to stammer (Taiwan pr. for this sense is [ji2])

variant of 吃[chi1]

power / force / strength / ability / strenuously

arduous and thankless task (idiom); strenuous and unrewarding