adjective
a word that describes or gives more information about a noun, in this case, 'reliable' describes something or someone that can be trusted or depended on
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The company prides itself on providing reliable services to its clients.
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You can always count on him to be reliable and show up on time.
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She's the most reliable person I know, always coming through for me.
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The foundation of their friendship is built on a reliable trust that never wavers.