役を勤める
to play the leading part
仲人役を勤める
to act as go-between―play the Hymen
to play the leading part
重い役を勤める
(芝居の)役を勤める
亭主役を勤める
to act as host―officiate as host―play the host―do the honours of the house―do the honours of the table
a person who occupies a responsible position
to act as host―officiate as host―act the host―play the host―do the honours of the house
act as (a) go‐between