1 invisible

1 to bear patiently

2 to endure silently

3 to forbear

1 to conceal

2 to hide (a taboo subject)

3 to cover up the truth

1 secrets

2 private business

3 privacy

1 vague

2 faint

3 indistinct

1 appearing and disappearing (idiom)

2 intermittently visible

1 to speak bluntly (idiom)

2 not to mince words

1 to speak one's mind

2 to speak candidly (idiom)

1 faintly discernible (idiom)

1 hiding a sickness for fear of treatment (idiom); fig. concealing a fault to avoid criticism

2 to keep one's shortcomings secret

3 to refuse to listen to advice