for the most part

in no small part

Synonym of in no small measure.

look the part

To appear suitable for a particular kind of work, position or role.

play a part

To be involved in such a way to affect the outcome, to be a contributing factor.

play one's part

Synonym of play a part.

say the quiet part loud

To willingly express a sentiment that is normally considered embarrassing or disreputable to hold; to reveal an ulterior motive.

take part

To participate or join.

take someone's part

To show support for or defend the actions of someone in the course of a debate, argument, etc.

till death do us part

Until death separates us; a common phrase stated between the bride and the groom at a Christian wedding, indicating a commitment to their union.