How many letters does the top answer for “in an impressive manner” have?

The most common answer is imposingly (10 letters).

Crossword clue: in an impressive manner

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

imposingly 10 letters wn-def

in an impressive manner

impressively 12 letters wn-def

in an impressive manner

in a very impressive manner 67% similar → dramatically