喜ぶ, 悦ぶ, 歓ぶ, 慶ぶ, よろこぶ
Conjugated: 喜んでいた
Godan verb, Transitive, Intransitive
1. to be delighted, to be glad, to be pleased, to rejoice
2. to congratulate
3. to welcome (a proposal, advice, etc.), to take kindly to
See 喜んで, as よろこんで...
4. to do with pleasure, to do gladly, to be happy (to do)
喜んで質問に答えましょう。