無

mess; spoiled; (come to) nothing

not writing or contacting for a while

deep feeling; inexpressible feeling; filled with emotion

yes or no; existence; flag indicator (comp); presence or absence marker

nothing; naught; nil; zero

to lose something

to disappear; to get lost

without

safety; peace; quietness

invalid; no effect; unavailable

reticence

plain; unfigured

chagrin; regret

nonsense; no meaning

countless number; infinite number

free; no charge

without permission; without notice

neglecting to stay in contact

impossible

useless; futility; needlessness; unnecessariness

ignorance

impolite; rude

wireless; radio

inefficiency; incompetence

absurd; unreasonable; excessive; rash; absurdity; nonsense