noun which may take the genitive case particle 'no'
overheated; hyper-; overearnest
Describes a state of being excessively heated, enthusiastic, or intense, often with a nuance of being slightly too much. Used for both literal overheating and figurative overexcitement.
議論が過熱気味になってきた。
The discussion is getting a bit overheated.
このパソコンは過熱気味だから、少し休ませよう。
This computer is running a little hot, so let's give it a rest.
Compound of 過熱 (overheat) and 気味 (tendency, slight feeling). The exact historical derivation is uncertain, but the word is a straightforward combination of these elements.