Ποια λεξη?

Ορισμός: “Feeling or showing worry or solicitude; "_________ parents of youthful offenders"; "was _________ about the future"; "we feel _________ about accomplishing the task at hand"; "greatly _________ not to disappoint a small child"”

Πρώτο γράμμα: C

Ποια λέξη ορίζεται;