tutor

nouns

a person who gives private instruction (as in singing, acting, etc.)
is derived from
is derived from

verbs

be a tutor to someone; give individual instruction
"She tutored me in Spanish"
is derived from
is a type of (narrower)
impart skills or knowledge to
"I taught them French"; "He instructed me in building a boat"
act as a guardian to someone
is derived from
is a type of (narrower)
be in a relationship with
"How are these two observations related?"