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

difficult 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 (disgusted)

sternly handsome

sour (wry) face

dread

the most helpful advice may be difficult to listen to

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

bitterish