unavailable

US /ˌʌn.əˈveɪ.lə.bəl/
UK /ˌʌn.əˈveɪ.lə.bəl/
1.

nicht verfügbar

not able to be used or obtained; not at someone's disposal.

:
material that is unavailable to the researcher
2.

nicht verfügbar

(of a person) not free to do something; otherwise occupied.

:
the men were unavailable for work