Verb (5-dan, う, intransitive)
1.  to come together;  to merge;  to unite;  to meet
2.  to fit;  to match;  to suit;  to agree with;  to be correct
3.  to be profitable;  to be equitable
Auxiliary verb (5-dan, う)
4.  to do ... to each other;  to do ... together
after the -masu stem of a verb