megbízható

• trustworthy firm

• he's all right

• good source

• standby

• from a trustworthy source, straight from horse's mouth

• pukka gen

• tenacious

• mercurial

• he is not a man to be trusted

• true blue

• dependably, trustworthily

• solidity, soundness, staunchness, sureness, trustiness, trustworthiness

• endurance test

• true as steel

• tenacity