indifferent
in-DIF-er-untadjMeaning not caring or interested either way
Memory hook it makes no DIFFERENCE to me. Ask Uncle Marcus if he wants the red cup or the blue one, and he shrugs: it makes no difference to him. He is indifferent.
The cat seemed completely indifferent to its expensive new toy.
In context Most of the class cheered when the field trip was announced, but Dev seemed indifferent; he simply shrugged and went back to his drawing.
Similar uninterested, unconcerned, apathetic, detached
Opposite interested, concerned, eager
From Latin indifferens, “making no difference”: in- (not) + differre (to differ).