There is more of a negative connotation with that. A better word would perhaps be unique or unusual.
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Yes, the word "stylish" can be used as a positive connotation.
is the word refined a connotation
Denouncing has a negative connotation.
Positive connotations for odd would be, different, unusual, strange, irregular, bizarre,
There isn't one. The word "cowardly" has a negative connotation. Words which have a similar denotation but a positive connotation might be "prudent" or "cautious".