able to be trusted to do or provide what is needed : able to be depended on

• The old well is a dependable source of water.
• a dependable old car
• He’s the team’s most dependable[=consistent] player.

— dependability /dɪˌpɛndəˈbɪləti/ noun [noncount]

• the car’s proven dependability

— dependably /dɪˈpɛndəbli/ adverb

• a plant that will bloom dependably, year after year