grandiose
🇺🇸
/ˈɡrændiəʊs/
🇬🇧
/ˈɡrændiəʊs/
adjective
R
trying to seem very important or grand, but either not practical or more fancy than necessary
He made a grandiose plan to build a huge mansion but ran out of money.
彼は巨大な屋敷を建てる壮大な計画を立てましたが、お金が尽きました。
translation
壮大