1. four

2. 4

1. nine

2. 9

1. green

2. (slang) (derived from 綠帽子|绿帽子[lǜ mào zi]) to cheat on (one's spouse or boyfriend or girlfriend)

1. probability

2. odds (Tw)

1. anxious

2. worried

3. apprehensive

1. frequency

1. rule (e.g. of science)

2. law of behavior

3. regular pattern

4. rhythm

5. discipline

1. to worry

2. anxiety (about)

1. male adult

2. the 4th of the 10 Heavenly Stems 天干[tiān gān]

3. fourth (used like "4" or "D")

4. small cube of meat or vegetable

5. (literary) to encounter

6. (archaic) ancient Chinese compass point: 195°

7. (chemistry) butyl

1. to filter

2. filter

1. ratio

2. rate

3. proportion

1. birthrate

1. discipline

1. hesitation

2. misgivings

3. doubt

1. rate

2. frequency

1. scientific law (e.g. law of conservation of energy)

2. (in human affairs) a generalization based on observation (e.g. "power corrupts")

1. same

2. uniformly

3. all

4. without exception

1. misgivings

2. apprehensions

1. cadence

2. rhythm

3. rhyme scheme

4. meter (in verse)

5. (linguistics) prosody

1. self-discipline

2. self-regulation

3. autonomy (ethics)

4. autonomic (physiology)