ADJ
- careful, close, detailed
- direct
- systematic
- casual
- empirical, scientific
- clinical
- astronomical
PREP
- for ~
- She was admitted to hospital for observation
- under ~
- The police have had him under observation for several weeks
- ~ of
- The survey was based on direct observation of over 500 schools
PHRASES
- powers of observation
- an artist with acute powers of observation
ADJ
- general
- astute, keen, shrewd
- interesting
PREP
- ~ about
- He smiled, and made some observation about the weather
- ~ on
- her witty observations on life
