What does 估计 (gū jì) mean in English?

Card 141HSK 2010 Level 4141/586
CARD141
PROGRESS24%
估计
估計
gū jì
to estimate; to reckon; CL:個|个[ge4]

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