English Reference
Adjective

cautious

adj.
C1 Advanced Oxford US /ˈkɔʃəs/ UK /kˈɔːʃəs/ cau·tious

adj.careful to avoid potential problems or dangers. You act this way when you want to be safe and not take unnecessary risks.

adj.characterised by the avoidance of potential risks or dangers; showing forethought and care. Often follows a linking verb or precedes a noun.


SIMPLE

He is very cautious when driving in the rain.

CONTEXTUAL

The investors remained cautious despite the positive news, waiting for more data before committing their capital.

COMPLEX

A cautious approach to the new policy may prevent the administrative errors that plagued the previous rollout, though it risks slowing down the necessary reforms.

Usage

Often takes the preposition 'about' or 'of' when referring to a specific concern.

Pitfall
He is cautious for the dogHe is cautious of the dog

When expressing wariness of a specific thing, use 'of' or 'about' rather than 'for'.

As economic uncertainty continues, many workers are becoming more cautious about taking the next step in their careers.

BBC News· 17 Aug 2026

He adds that he should have taken a more cautious approach to investing in tech stocks.

BBC News· 13 Aug 2026

From caution (“from Latin cautus”) + -ous.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated