stumbling block
A hindrance, obstacle or impediment; an opportunity for error.
Idioms are a common stumbling block for learners of a language.
ADJ
big, huge, large, massive | small | solid | concrete, stone, wooden | building
starting (for a runner)
The young athlete exploded from the starting blocks and raced ahead of all the other competitors.
breeze
ADJ
high-rise, tower
administration, apartment, cell, office
The new administration block opened last month near the university campus.
PREP
in a/the ~
My grandfather worked as a caretaker in a residential block for thirty years.
~ of
A large block of stone was discovered during the construction of the new building.
ADJ
mental, writer's
I've been struggling with writer's block for two weeks and can't finish my essay.
VERB + BLOCK
experience, have, suffer from
The writer experienced a creative block and couldn't finish the novel for months.
ADV
completely | almost | partially, partly
off, up
The construction workers blocked off the street for repairs last week.
VERB + BLOCK
try to
move to
The defender moved to block the goalkeeper's view of the field.
PREP
with
A fallen tree blocked the road with branches after the storm.
ADV
successfully
effectively
The heavy traffic effectively blocked our route to the airport yesterday afternoon.
VERB + BLOCK
attempt to, seek to, try to
move to
Several environmental organizations moved to block the construction of the new highway.
PHRASAL VERBS block sth out
ADV
completely
Heavy snow completely blocked the mountain road for three days last week.
almost