reliable
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reliable
Such that you can rely on someone or something; dependable and trustworthy. This can refer to people, information, devices, or services.
Sie ist eine sehr verlässliche Mitarbeiterin, die ihre Aufgaben immer pünktlich erledigt.
She is a very reliable employee who always completes her tasks on time.
The adjective 'verlässlich' (reliable) belongs to the word family of the verb 'sich verlassen auf' (to rely on). If a person or a piece of information is reliable, it means that you can rely on it.
Er ist ein verlässlicher Freund, auf den ich mich immer verlassen kann.
He is a reliable friend whom I can always rely on.
'Verlässlich' (reliable) often describes people ('ein verlässlicher Partner' — a reliable partner), information ('eine verlässliche Quelle' — a reliable source), or technical devices and services ('ein verlässliches Auto' — a reliable car, 'eine verlässliche Internetverbindung' — a reliable internet connection).
Für den Journalisten sind verlässliche Informationen das Wichtigste.
For the journalist, reliable information is the most important thing.
'Verlässlich' (reliable) can appear before a noun (attributive) or stand alone with the verb 'sein' (to be) (predicative). Both uses are very common.
Wir suchen eine verlässliche Person für die Kinderbetreuung.
We are looking for a reliable person for childcare.
sure / safe
'sicher' and 'verlässlich' can both describe that you can rely on something. 'sicher' fits especially with things, methods, or technical processes that work well and do not cause problems. 'verlässlich' often fits with people, information, devices, or services that you can trust. With people, 'verlässlich' sounds more natural because it also expresses trust and reliability. 'sicher' can also have many other meanings, for example without danger or without doubt.
Meine Kollegin ist verlässlich und hält ihre Termine immer ein.
My colleague is reliable and always keeps her appointments.
Für die Reise wählen wir eine sichere Verbindung mit dem Zug.
For the trip, we choose a reliable train connection.