Despite his wealth, he rarely indulged in extravagances, preferring to donate most of his income to charity.

He threw an extravagent party to celebrate his promotion.

He extravagated from the original topic so thoroughly that no one remembered the point he was making.

When the historian extravagates, the lecture drifts into charming but irrelevant anecdotes.

Despite repeated warnings, the debate participant continued extravagating, steering the conversation into elaborate speculations.