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Unfavourable (adjective)
Serving to hinder or oppose; adverse, disadvantageous, inconducive, unsuitable.
“favourable”
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Unfavourable (adjective)
Not auspicious; ill-boding.
“inauspicious|unfortunate|Thesaurus:unlucky”
“favourable|fortunate|Thesaurus:lucky”
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Unfavourable (adjective)
Of a disapproving.
“favourable”
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Unfavourable (adjective)
Of wind or weather: causing delay or travel or work; inclement.
Wiktionary
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