avail

nouns

a means of serving
"of no avail"; "there's no help for it"

verbs

use to one's advantage
"He availed himself of the available resources"
is a type of (narrower)
put into service; make work or employ for a particular purpose or for its inherent or natural purpose
"use your head!"; "we only use Spanish at home"; "I can't use this tool"; "Apply a magnetic field here"; "This thinking was applied to many projects"; "How do you utilize this tool?"; "I apply this rule to get good results"; "use the plastic bags to store the food"; "He doesn't know how to use a computer"
be of use to, be useful to
"It will avail them to dispose of their booty"
is a type of (narrower)
give help or assistance; be of service
"Everyone helped out during the earthquake"; "Can you help me carry this table?"; "She never helps around the house"
take or use
"She helped herself to some of the office supplies"
is derived from