sterile adj.

1 completely clean

VERBS be | become | remain | make sth | keep sth This top fits over the bottle and keeps the teat sterile.

ADV. completely | virtually

2 not able to produce young animals/babies

VERBS be | become | remain | leave sb, make sb

ADV. permanently Male workers were made permanently sterile by this pesticide.

3 with no interest or life

VERBS be | become, grow Their relationship had grown sterile over the years.

ADV. very | increasingly the increasingly sterile debate on constitutional reform | largely | rather, somewhat