observe

To see or notice something, especially when paying close attention.

• We observed a small change.
• The doctor observed no signs of infection.
• Have you observed any differences between the two groups?

How to use it: observe that… (We observed that the plants grew faster in sunlight.); observe someone/something doing something (The nurse observed the patient shaking.)

Similar words: notice, see, detect

Common phrases: observe a change, observe something closely, observe a difference

To watch someone or something carefully to learn about them.

• We observed birds in the garden.
• She observed the children while they played.
• You can observe the moon through this telescope.

How to use it: observe someone/something doing something (The students observed ants carrying food back to their nest.)

Similar words: watch, study, monitor

Common phrases: observe the stars, observe someone closely, observe animal behaviour

To do what a law, rule, or agreement requires.

• Please observe the safety rules.
• Both sides agreed to observe the ceasefire.
• Drivers who fail to observe speed limits may be fined.

Similar words: obey, follow, comply with

Opposites: break, disobey

Common phrases: observe the rules, observe a ceasefire, observe speed limits

To say or write something you have noticed or think is true.

• He observed that the room was cold.
• As she rightly observed, we still need more money.
• The report observes that many families cannot afford fresh food.

How to use it: observe that… (The writer observed that small changes can have large effects.)

Similar words: remark, comment, note

Common phrases: observe that, rightly observe, observe dryly

To mark a special day or follow a tradition by doing the usual activities or ceremonies.

• Our family observes this holiday every year.
• They observed a minute of silence for the victims.
• Many people observe the festival by sharing a meal.

Similar words: mark, celebrate, keep

Common phrases: observe a holiday, observe the Sabbath, observe a fast