1. [adj]  lacking clarity of meaning; causing confusion or perplexity; "sent confusing signals to Iraq"; "perplexing to someone who knew nothing about it"; "a puzzling statement"
2. [adj]  causing confusion or disorientation; "a confusing jumble of road signs"; "being hospitalized can be confusing and distressing for a small child"

CONFUSING is a 9 letter word that starts with C.