Meanings

(strict) observance of the Buddhist precept of lifelong celibacy

fate (safety) of a person (persons) being unknown

permanence

poor academic performance

suspicious behavior

lacking enough gravity for (a position, task)

situation (turn of events) being unfavorable (disadvantageous)

permanent and immutable

being beyond recovery

firm and solid

adulterous love affair with someone at work

at age forty, one has no doubts

unidentifiable

untraceable

policy-induced slump

the instability of a political situation

of unknown affiliation

dubious

worry (uncertainty, uneasiness, insecurity) about one's life (future)

poor (academic) performance