pre-noun adjectival
admirable; praiseworthy; commendable
Pre-noun adjectival (rentaishi) used to praise someone's attitude, effort, or character. Often appears in set phrases like 見上げたものだ or 見上げた根性.
彼の見上げた努力には感心する。
I admire his admirable effort.
見上げた根性だね。
That's some admirable guts.
Derived from the past tense of the verb 見上げる (to look up), literally 'looked up to', which became a fixed pre-noun adjectival meaning 'admirable'.