exceptionally
adv.to a very high degree or much more than usual. You use this to emphasize that someone or something is much better or more extreme than others.
adv.to an unusual or remarkable degree; used as an intensifier to indicate that a quality exceeds the normal standard. Typically modifies adjectives or other adverbs.
“The weather today is exceptionally warm for winter.”
“The young pianist showed an exceptionally high level of skill during her first public performance.”
“While the entire team performed well, the lead researcher was exceptionally diligent in documenting the minor anomalies that others had overlooked during the initial trial phase.”
Typically placed immediately before the adjective or adverb it modifies.
Learners often use the adjective form 'exceptional' when an adverb is required to modify a verb or another adjective.
Usage exceptionally high · exceptionally low · exceptionally well
“It allows information to travel over long distances at high speed because the glass inside the fiber is extremely pure and its surface is engineered to be exceptionally smooth.”
“Named Spea labreae, the Ice Age spadefoot toad is an exceptionally rare find—only one other extinct Pleistocene amphibian has ever been identified in North America.”
Common in science writing
From exceptional + -ly.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.