Noungreat blue sea; ocean

Nounblue waves; blue wave · hair that has lost its shine due to ageing

Expressions (phrases, clauses, etc.)the world is a scene of constant changes; the blue sea turns into a mulberry field

Expressions (phrases, clauses, etc.)the world is a scene of constant changes (as a mulberry field changing into a blue sea)

Nountalented person unbeknownst to the world