guaranteedly

Guaranteedly is an adverb in English derived from the verb guarantee and the adjective guaranteed. It means in a manner that is guaranteed or backed by a guarantee. In contemporary usage it is relatively uncommon and can come across as formal or pedantic. When used, it usually serves to emphasize the certainty promised by a guarantee or warranty.

Formation and usage notes: The base verb guarantee yields the adjective guaranteed (meaning assured or protected by a guarantee). The adverb guaranteedly is formed by adding the standard -ly suffix to that adjective. The result is analogous to other -edly adverbs, but guaranteedly is far less frequent in everyday speech and writing.

Typical usage guidance: Because guaranteedly sounds awkward to many readers, prose often avoids it. Preferred alternatives include using guaranteed as an adjective, or employing phrases such as “guaranteed to,” “with a guarantee,” or “guaranteed results.” For example: “The product is guaranteed to work” or “The warranty guarantees the product against defects.” In formal or marketing contexts, precise language and explicit guarantees are usually more effective than relying on guaranteedly.

Related terms: guarantee (noun or verb), guaranteed (adjective), guaranteeable or guaranteed-able (adjectives describing something able to be guaranteed). Writers may choose among these options based on clarity and register, instead of relying on guaranteedly to convey certainty.