Definition of "Fearful" :

adjective: experiencing or showing fear

"A fearful glance."

adjective: causing fear or dread or terror

"A fearful howling."

adjective: timid by nature or revealing timidity

"Cast fearful glances at the large dog."

adjective: lacking courage; ignobly timid and faint-hearted

adjective: extremely distressing

"Fearful slum conditions."