Here are the definitions based on the phrases you've provided:
-
Something that happens periodically or repeatedly: This can be described as cyclical or recurrent.
-
Showing a keen interest or enthusiasm for something: This can be referred to as being enthusiastic or zealous.
-
The winter coat of a small weasel-like mammal: This specifically refers to ermine, which is the white fur of the stoat in its winter coat.
-
Not in harmony with the environment or surroundings: This can be described as discordant or dissonant.
If you need further clarification or additional information on any of these terms, feel free to ask!