A ‣ Words similar in form and close in meaning 
The United Nations should intervene to stop the civil war. [step in; neutral in meaning]
She shouldn’t interfere in things that don’t concern her. [involve herself; negative and critical]
The phone’s been ringing continually. It’s driving me crazy. [very frequently; often negative]
Stir the mixture continuously until it boils. [without stopping; from a recipe]
There’s a new series on TV about space exploration. [set of related programmes]
I don’t want to miss this week’s episode of Oliver Twist. It’s a serial – if I miss one, I’ll lose track of the story. [set of programmes where the story continues over different episodes]
We sat in the shade of a big oak tree. [out of the sun; pleasant connotation]
The evening sun cast long shadows. [dark areas or shapes]
They lived in the shadow of a chemical factory. [in a place dominated by; negative connotation]
She complimented me on my performance at the concert. [praised, expressed admiration for]
I took a course in programming to complement my other IT skills. [make them seem better, more complete or more attractive in combination]
B ‣ Words of different form but from the same area of meaning 
The cake mixture should be moist but not sticky. [slightly wet; from a recipe]
The climate in the north is damp and rather cold. [slightly wet in an unpleasant way]
The theme of the festival was ‘1,000 years of culture’. [the main idea that everything followed]
The topic of conversation soon changed to the news. [what the people talked about]
The security officer noticed a broken window. [concerned with protection of property, etc.]
The safety officer told him that he must wear a helmet. [concerned with prevention of accidents, etc.]
We took a smaller road in order to avoid the roadworks on the motorway. [stay away from]
The escaped prisoner evaded capture for three months. [escaped from; more formal]
C ‣ Phrasal combinations 
Phrasal verbs may have noun forms with different meanings.
verb | noun |
Six men broke out of the prison. | There was a breakout at the prison. |
The disease has broken out in several villages in the north of the country. | There has been an outbreak of the disease in several villages in the north of the country. |
Economists are looking out for signs of an end to the recession. | The outlook is not good. The economy seems to be stagnant. |
He stood at the corner, looking out for police cars. | He was the lookout while the others robbed the bank. |
The Swimming Club decided to set up a committee to look into the club rules. | The company setup is quite complex, with branches in 30 different countries. |
In some cases, two verb forms have the same words in a different order and different meanings.
verb 1: particle first | verb 2: particle second |
upend [move into a vertical position] | end up [finish] |
uphold [confirm, support] | hold up [delay] |
outdo [do better than] | do out [decorate] |
outrun [run faster than] | run out [use something so there is none left] |
upset [make someone worried, unhappy or angry] | set up [organise or arrange something] |
Language help
Common prepositions often occur as prefixes, e.g. up and out in the table above. Other examples include over (overcook, overcome), in (input, income). Make a note of new examples as you meet them.