What does 摸索 (mōsuǒ) mean in English?

Card 1790HSK Level 41790/3571
CARD1790
PROGRESS50%
摸索
mōsuǒ
fumble; grope(Verb)
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Reveal: Click/Space/Enter/↑↓/w/s/j/k•Navigate: ←→/h/l/a/d