trouble ②anxiety

trouble (I have put you through) ②thank you (for your hard work)

thank you (for your hard work)

hardship

pain ②duhkha (suffering)

hard fight

I appreciate your efforts

anguish

pain

(mental) agony

suffering

complaint

overanxiety

difficult situation

bitterness ②bitterness and astringency

a hard time

pains

anguish

last resort

worldly-wise man

painful ②distressing ③hard to do

to suffer

pain

to torment ②to harass

sultry ②uncomfortably hot-looking (clothing, etc.)

unsightly

choking ②oppressive

formal

pain

painful

(out of) desperation

heavy (feeling, etc.)

unable to sleep well

cramped

lame excuse

unpleasant to hear ②difficult to hear

(feeling of) tightness in the chest

danger past, God forgotten

misery

to cause one's parents distress

poor (at) ②not one's cup of tea

bitter

bitterness

slightly bitter (taste) ②bittersweet (memory, experience, etc.)

bitterness

awareness that someone will be hard to deal with

bitter smile

unpleasant

bitter experience

bitter medicine

sour (expression)

bitter-tasting bug

to feel bitter

to look sour

sternly handsome

sour (wry) face

dread

the most helpful advice may be difficult to listen to

Japanese timber bamboo (Phyllostachys bambusoides) ②Simon bamboo (Pleioblastus simonii)

bitterish