mess
out door
The participles for the verb 'mimic' are mimicking and mimicked, either of which could be used as an adjective. They would refer to a mimic, or to the thing being mimicked, respectively. The use of mimic itself as an adjective to mean 'imitative' is not well supported, and 'mock' in that sense would probably be used.
"New" is the antomym for all of those terms except, of course, "new."
Not every English word has an antonym. Statistics does not have an antomym. What word could there be for the 'opposite' of statistics? What is the opposite of zinc? What is the opposite of knitting? What is the opposite of marshmallow? or sneeze? or orbit? or cufflink?
Ignore
disgrace
traits
mess
out door
Diurnal diurnal
Talkative or outgoing.
destroy or ruin
I mimicked my sister when i was being annoyed by her sound she made.
The past tense is mimicked.
An antonym for joyfully is unhappily.
The impressionist mimicked the Prime Minister's voice so well that it fooled his colleagues !