(idiomatic) Under close scrutiny or examination.

Arrested by the police.

(idiomatic) Whose future is uncertain due to an anticipated threat or change in circumstance. / (idiomatic) Under suspicion; subject to critical inspection.

(Australia, New Zealand) Under pressure to perform, e.g. at work or in a sports contest. / Used other than figuratively or idiomatically: see under, pump.

(idiomatic) Under great pressure to perform. / (poker) Of, pertaining to, or in the situation of first player to act on the first round of betting.

(idiomatic) In Australia. / (idiomatic) Into Australia; to Australia. / (euphemistic, rare) Hell; in Hell.

A garment worn underneath a kimono.

(idiomatic) Being taken care of or being addressed. / (literally) Being actively controlled, or able to be actively controlled in its current state.

(idiomatic) Bewitched; held (as if) by the power of a magical spell.

(transitive, usually passive) To overwhelm (with large quantities of something to be dealt with).