unpredictably difficult in operation; likely to be troublesome; "rockets were much too fractious to be tested near thickly populated areas"; "fractious components of a communication system"
stubbornly resistant to authority or control; "a fractious animal that would not submit to the harness"; "a refractory child"
enthusiastic approval; "the book met with modest acclaim"; "he acknowledged the plaudits of the crowd"; "they gave him more eclat than he really deserved"
praise vociferously; "The critics hailed the young pianist as a new Rubinstein"