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.
I admire his admirable effort.
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'.