She lavishly praised the team's efforts in her speech, which lifted everyone's spirits.

lavishly 是副词，由形容词 lavish（慷慨的、丰富的）加上副词后缀 -ly 构成。lavish 来自古法语 lavasse（"泛滥"），引申为"大量给予"的意思。lavishly 表示"慷慨地、大方地"，常用来形容给予赞美、花费金钱等行为。