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The child was frightened by the loud thunder.
The child was very scared by the loud thunder.
feeling extreme fear or anxiety
She looked frightened when she heard the noise outside.
She appeared very scared when she heard the noise outside.
The dog was frightened by the fireworks.
The dog was terrified by the fireworks.
Often used to describe a strong emotional reaction to a perceived threat or danger.
Use 'frightened' to describe a strong emotional reaction to fear, often in informal contexts.
Remember that 'frightened' is similar to 'scared' and 'terrified' but can be stronger in some contexts.
From Middle English 'fraytened', past participle of 'frayten' (to frighten), from Old English 'fǣhtan' (to terrify), related to 'fear'.
Can be used to describe both physical and emotional reactions to fear. Often used in informal contexts to express strong fear.