Blithe can be used as given below examples,
Some students are always blithe that they don’t even care to listen their teacher.
His blithe behavior towards the company and job led the authorities to fire him from the job.
Adjective blithe: lighthearted, happy, carefree or indifferent behaviour
Something which done without much care and thought
Blithe has synonyms like heedless, careless, cheerful, happy, unconcerned, thoughtless
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