"avoid" => verb
This is a transitive verb and it must have an object.
Meanings:
1.to stay away from a person, place, situation, etc. => Example: "He's been avoiding me all week." ● "Try to avoid the city centre.
2.to prevent something from happening. => Example: "Book early to avoid disappointment."
3.avoid doing something: to intentionally not do something. => Example: "She managed to avoid answering my question.
●avoidable (adj.): possible to avoid =>¥Opposite unavoidable.
●avoidance (noun),[Uncountable]: when you avoid something.
USAGE
Avoid doing something
When avoid is followed by a verb, the verb is always in the –ing form.
"I avoided seeing him for several days"
"I avoided to see him for several days"