verbs
secure with or as if with ropes
"tie down the prisoners"; "tie up the old newspapers and bring them to the recycling shed"
invest so as to make unavailable for other purposes
"All my money is tied up in long-term investments"
is a type of (narrower)
make an investment
"Put money into bonds"
restrain from moving or operating normally
"Traffic is tied up for miles around the bridge where the accident occurred"
is a type of (narrower)
block passage through
"obstruct the path"
secure in or as if in a berth or dock
"tie up the boat"