auxiliary (suomeksi)

avustava (a: helping; giving assistance or support)
ylimääräinen (a)
varalla toimiva tai ylimääräinen (s)
moottorilla varustettu purjealus (s)
apuverbi (s)
apu- (a: helping; giving assistance or support / supplementary or subsidiary / held in reserve for exceptional circumstances / relating to an auxiliary verb)
lisä- (a: helping; giving assistance or support / held in reserve for exceptional circumstances)
apumoottorillinen (a: of a ship, having both sails and an engine)
avustaja (s: person or group that acts in an auxiliary manner)