unreliably
Adverb
Meaning
in an unfaithful undependable unreliable manner
Source: WordNetSynonyms
Antonyms
Examples
In a banana republic, one might slip on a banana peel but things do work - now and then for the people, albeit inefficiently and unreliably.
This caused many issues with incompatibility, where a true IBM-compatible third-party card (designed for an 8 MHz or 4.77 MHz bus) might not work in a higher speed system (or even worse, would work unreliably).
Other fossils have been found, but many are either unreliably dated or else unreliably identified.
The gross figures may mislead slightly, as most of the German troops fighting on the side of the French fought at best unreliably and stood on the verge of defecting to the Allies.