Sentence:  The "ownmost" possibility of be-ing itself which Dasein (<WSD>facticity</WSD>) is, and indeed without this possibility being "there" for it, may be designated as "existence". It is with respect to this authentic be-ing itself that <WSD>facticity</WSD> is placed into our forehaving when initially engaging it and bringing it into play in our hermeneutical questioning. 
Meaning of the word marked with <WSD> tags:  In existentialism, the state of being in the world without any knowable reason for such existence, or of being in a particular state of affairs which one has no control over.