aid (n)

A hand-rail is the primary means of preventing a fall and a useful aid when climbing stairways.

It is a work bench design aid for use during sales meetings.

A stairway is a climbing aid that features at least three consecutive steps.

Hilfe (f)

协助 (n)

支撑件 (n)

asistencia (n)

ayuda (n)

soporte (n)