Synonyms of dispassionately

2 Syllables
coldly, justly
3 Syllables
soberly, neutrally, patiently, squarely
4 Syllables
equitably, enduringly, forbearingly, resignedly, coldheartedly, unfeelingly, detachedly, unbiasedly, ethically, conscientiously
5 Syllables
objectively, impassively, evenhandedly, indifferently, open-mindedly
6 Syllables
disinterestedly, considerately