to smile happily because of feeling proud
誇らしげに微笑む (hokorashige ni bishōmu)
"His mother beamed with pride at his graduation ceremony."
"彼の母親は彼の卒業式で誇らしげに微笑んでいました。" (kare no hahaoya wa kare no sotsugyōshiki de hokorashige ni bishōnde imashita)
to keep following a promise, rule, or plan
to clearly show happiness or joy through your appearance or...
to relax and become calm after being upset or stressed
to do something too much or excessively
to accept additional tasks or duties in one’s role
to fail to understand each other during a discussion