IPA: /ʌnˈfeɪvərəblɪ/
KK: /ʌnˈfeɪvərəbli/
In a way that is not good or positive; negatively.
The proposal was received unfavorably by the committee.
Unfavorably → It is formed from "un-" (meaning not) and "favor" (from Latin "favorem", meaning goodwill or support) and "-ably" (meaning in a manner). The word "unfavorably" means in a manner that is not supportive or beneficial.
Think of 'not' ('un-') being combined with 'goodwill' ('favor') to remember that 'unfavorably' means in a way that lacks support or is negative.