undesirably
Undesirably is an adverb used to indicate that something occurs in a way that is not desirable or to an extent that is undesirable. It modifies verbs, adjectives, or other adverbs, and is common in formal, analytical, or evaluative writing.
Etymology and formation: The word is formed by adding the adverbial suffix -ly to the adjective undesirable.
Usage and nuance: Undesirably communicates a normative assessment, often in contexts such as policy analysis, research
Related terms: Undesirable is the corresponding adjective, while unfavorably or detrimentally are other adverbs or adjectives