After the jokester arrived, the usually reserved group became mirthier than anyone expected.

Her mirthfullest laugh filled the room and lifted everyone's spirits.

Her mirthy laugh lifted the spirits of everyone at the gathering.

Her laughter was the mirthiest sound in the room.

Her mirthfuller smile lifted the spirits of everyone in the room.

Her mirthfull laugh echoed through the hall, lifting everyone's spirits.

Her mirthlessness hung over the gathering like a gray cloud, silencing even the most cheerful of conversations.

At the comedian's unexpected punchline, the audience erupted into mirthquakes that shook the balcony.

When the comedian delivered the absurd punchline, a mirthquake rippled through the audience.