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block [blocked, blocking, blocks]▼(to prevent passing)verb[UK: ˈblɒk] [US: ˈblɑːk]
clog [clogged, clogging, clogs]▼(to block or slow passage through)verb[UK: klɒɡ] [US: ˈklɑːɡ]
obstruct [obstructed, obstructing, obstructs]▼(To block or fill (a passage))verb[UK: əb.ˈstrʌkt] [US: əb.ˈstrəkt]
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