an invitation or call to play a game, run a race, have a fight etc to see who is better, stronger etc

dispute, question

to ask for (something) as if ordering or as if one has a right to

question, request

inquiry

inquest

the act of examining or being examined; a (usually written) test of knowledge or ability

test, analysis

to go after (wild animals); to search

search, chase

the process of asking; an investigation

asking; looking into

(especially) a formal investigation that ignores the legal and human rights of the people involved

official inquiry

a question raising a doubt about the truth of something

demand for answers

a form of a sentence which asks for information, an answer etc; to express or feel doubt about (something)

asking for answer