How many letters does the top answer for “cause to move by striking” have?

The most common answer is hit (3 letters).

Crossword clue: cause to move by striking

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

hit 3 letters wn-def

cause to move by striking

cause to be unable to move 50% similar → immobilise, immobilize

cause to move around 50% similar → mobilise

cause to move by pulling 50% similar → draw, pull