1. sour
2. tart
3. sick at heart
4. grieved
5. sore
6. aching
7. pedantic
8. impractical
9. to make sarcastic remarks about sb
10. an acid

1. sour
2. acrid
3. (of a person) embittered

1. sour
2. acid

1. to assail the nostrils
2. acrid
3. pungent

1. bitter
2. harsh
3. grim
4. ruthless
5. severe
6. cut-throat (competition)

1. bitter
2. desperate

1. bitter
2. painful
3. deeply distressed

1. bitter
2. hardship
3. pain
4. to suffer
5. to bring suffering to
6. painstakingly

1. pungent (taste)
2. bitter
3. fig. sad
4. miserable

1. thistle
2. common sowthistle (Sonchus oleraceus)
3. bitter (taste)
4. cruel
5. flowering grass in profusion

1. grief
2. remorse
3. deep in sorrow
4. bitter (anguish)
5. profound (condolences)

1. pain
2. suffering
3. painful

classifier: 個

1. strenuously
2. persistently
3. hard
4. painful