Phrasal verbs are an important feature of the English language. The meaning of a phrasal verb often bears no relation to the meaning of either the verb or the particle which is used with it. Many phrasal verbs have several different meanings.
Root up (to take a whole plant out of the earth, including its roots)
The farmer tried to root up all the plants in his garden.
Rope in (to persuade someone to help you with something)
We roped in grandfather to help us with gardening.
Rope off (to put ropes around an area in order to stop people entering it)
We had to rope off the old building in order to prevent schoolchildren entering it.
Rough out (if you rough out an idea you write the main points without giving the details)
She has roughed out a play for us to perform.
Rough up (to hurt someone by hitting them)
The intruder was roughed up by the guards.
Rough in (to add something to a drawing without showing the details)
The artist roughed in a few birds to make the painting beautiful.
Round down (to reduce a number to the nearest simple number)
When I wanted to buy 29 pencils, the salesman rounded it down to 30.
Round off (to do something as a way of finishing an event)
Shall we round the meal off with some coffee?
Round on (to suddenly turn and attack someone)
She suddenly rounded on him in a furious way.
Round out (to make something more complete)
She added a few curtains to round out the beauty of her living room.
Round up (to gather together a group of people or animals)
The dogs rounded up the sheep scattered everywhere.
Rout out (to make someone come out of a place)
The father had to rout his son out of bed.
Rub along (to live or work together in harmony)
We managed to rub along in a small office for one year.
Rub down (to make someone or something clean and dry by rubbing them with a cloth)
Use a towel to rub the dog down.
Rub in (to talk to someone about something which you know they want to forget)
There is no need to rub it in.
Rub off (if a quality of a particular person rubs off, other people begin to have it)
Some of his mother’s good qualities seem to have rubbed off him.
Rub out (to remove writing from something by rubbing it with a piece of rubber)
If you write something in pencil, you can rub it out easily.
Ruffle up (to make something that is smooth become uneven.)
Birds usually ruffle up their feathers when they sense danger.
Rule out (to decide that something or someone is not suitable for a particular purpose)
The police have not ruled him out as a suspect.
Rumble on (a situation or process continues for a long time)
The scandal over his ill-gotten money has been rumbling on for many years.
Run across (to meet someone you know when you are not expecting to meet them)
I ran across my best friend when I visited the museum.