buoyant

adjective
1
tending to increase or stay at a high level, usually showing financial success
پررونق, رو به رشد, رو به پیشرفت
2
cheerful and feeling sure that things will be successful
شادمان, پرروحیه, سرزنده, بشاش, خوشبین
They were all in buoyant mood.
3
floating, able to float or able to keep things floating
شناور, روی‌آب‌مانده
The boat bobbed like a cork on the waves: light and buoyant.
Salt water is more buoyant than fresh water.