VERBS
- be
- become
- remain
- make sth
- keep sth
- This top fits over the bottle and keeps the teat sterile
VERBS
- be
- become
- remain
- leave sb, make sb
ADV
- permanently
- Male workers were made permanently sterile by this pesticide
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