1. Having nothing inside
2. Holding or containing nothing
3. Devoid of significance or point; SYN. hollow, vacuous.
4. Emptied of emotion
5. Needing nourishment; SYN. empty-bellied.

(Homonym: idle, idol).
1. Not in active use; SYN. unused.
2. Not in action or at work.
3. Not having a job; SYN. jobless, out of work.
4. Lacking a sense of restraint or responsibility; SYN. loose.
5. Silly or trivial; SYN. light.

ETYM Latin otiosus, from otium ease.
1. Producing no useful result; futile.
2. Being at leisure; idle.
3. Lacking use or effect; functionless.
4. Serving no useful purpose; having no excuse for being; SYN. pointless, superfluous, wasted.
5. Superfluous; redundant; futile; useless; functionless; idle.

1. Having no beneficial use or incapable of functioning usefully
2. Not useful