What does 幸亏 (xìng kuī) mean in English?

Card 1090HSK 2010 Level 51090/1311
CARD1090
PROGRESS83%
幸亏
幸虧
xìng kuī
fortunately; luckily

Reveal: Click/Space/Enter/↑↓/w/s/j/kNavigate: ←→/h/l/a/d