Question

afraid
 /əˈfreıd/  adj  , not used before a noun
  1 [more ~; most ~] : feeling fear: such as
  1 a : worried that something will cause pain or injury
   Don't be afraid [=frightened, scared]–the dog won't hurt you.
  — often + of
   I don't like tall buildings because I'm afraid of heights. [=of being high up in the air]
   He's afraid of snakes.
   All the kids at school were afraid of him.
  1 b : nervous about doing something
  — often + of
   She's afraid of failing/failure.
   He wasn't afraid of saying what he thought.
   Don't be afraid of [=don't worry about] what everyone else thinks.
  — often followed by to + verb
   He wasn't afraid to say what he thought.
   I wanted to visit her, but I was afraid to ask.
   Don't be afraid to take risks.
  1 c : nervous or worried that something might happen
   She's afraid (that) she might fail.
   We were all afraid (that) she wouldn't live.
   I'm afraid (that) everyone will laugh at me.
   I was afraid (that) you would say “no.”
  2
  — used in the phrase I'm afraid as a polite way of showing that you are sorry about a disappointing, negative, or critical statement
   I'm sorry, but I'm afraid (that) I won't be able to come to your party.
   She tries hard, but I'm afraid that her work just isn't very good.
   I'm afraid that I still don't understand the problem.
   This is only the beginning of the battle, I'm afraid.
   Most of us worked very hard, but she, I'm afraid to say [=I'm sorry to say; I regret to say], did no work at all.
   “Is it raining?” “I'm afraid so.” = “I'm afraid it is.” [=yes, it is]
   “Can you come to our party?” “I'm afraid not.” = “I'm afraid I can't.” [=no, I can't come]
  3 — used with not to say that someone is willing to do something;
  — often + of
   She's not afraid of hard work. = She's not afraid of working hard. [=she's willing to work hard; she works hard]
   You can't be afraid of getting dirty in this job. [=you have to be willing to get dirty in this job]
  — often followed by to + verb
   She's not afraid to work hard.
   He's not afraid to admit his mistakes.
  afraid for
   : feeling fear or worry about (something or someone)
    I'm afraid for the children.
    They were afraid for their lives. [=they feared for their lives; they were afraid that they might die]
    He's afraid for his job. [=he's worried that he might lose his job]