sicher
Sicher is a German word with several closely related meanings. As an adjective, it denotes safety or security, as in ein sicherer Ort (a safe place) or sichere Maßnahmen (secure measures). It can also mean certain or undoubtful, as in "Es ist sicher" (it is certain / it is safe). As an adverb, sicher means surely or certainly, yielding phrases like "Er kommt sicher" (he will surely come). In everyday speech, "Sicher!" can be used as an affirmative interjection, roughly meaning "Sure!" or "Of course!"
Etymology and relations: Sicher belongs to the Germanic family of words tied to safety and certainty. It
Usage notes: In compounds and technical language, sicher often describes reliability or protection, as in eine