negative (test result); indicating that a test did not detect the target (e.g., a negative medical test)
新型ウイルスの検査は陰性だった。
The test for the novel virus was negative.
血液検査の結果は陰性で、特に異常は見つからなかった。
The blood test results were negative; no abnormalities were found.
抗体検査が陰性ならワクチン接種の効果は確認できない。
If the antibody test is negative, the effect of vaccination cannot be confirmed.
gloomy; negative or pessimistic (referring to mood, attitude, or disposition)
彼は最近陰性の見方が強く、明るく話すことが少ない。
Lately he has been quite pessimistic and rarely speaks cheerfully.
あの映画は暗くて陰性な雰囲気が強かった。
That movie had a dark, gloomy atmosphere.