Webster's Revised Unabridged Dictionary · 1913

Afraid

Afraid ({not transcribed}) , past participle (adjectival)

[Old English afrayed, affraide, past participle of afraien to affray. See Affray, and compare Afeard.]

Impressed with fear or apprehension; in fear; apprehensive. [Afraid comes after the noun it limits.]
Back they recoiled, afraid. — Milton

This word expresses a less degree of fear than terrified or frightened. It is followed by of before the object of fear, or by the infinitive, or by a dependent clause; as, to be afraid of death. “I am afraid to die.” “I am afraid he will chastise me.” “Be not afraid that I your hand should take.” Shak. I am afraid is sometimes used colloquially to soften a statement; as, I am afraid I can not help you in this matter.