This is the 1832nd most frequent Japanese word.
悪
"悪" (aku) means "evil," "badness," or "wickedness."
Here, '悪い' is an adjective describing the quality of the '天気' (weather).
悪い天気が続いていますね。
Bad weather is continuing.
In this sentence, '悪' is used as a noun, indicating a concept of 'evil' or 'malicious intent'.
彼の行動には悪があります。
There is evil in his actions.
Here, '悪' represents metaphorically malicious situations or actions, emphasizing its abstract usage.