/ ˌɪndɪˈtɜːmɪnət; NAmE -ˈtɜːrm-/ adjective
that cannot be identified easily or exactly :
She was a tall woman of indeterminate age.
► in·de·ter·min·acy / -nəsi; NAmE / noun [ U ]
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WORD ORIGIN
early 17th cent.: from late Latin indeterminatus , from in- not + Latin determinatus limited, determined (, past participle of determinare limit, fix, from de- completely + terminare terminate).