profondes
Profondes is the feminine plural form of the French adjective profond, meaning deep or profound. It is used to modify feminine plural nouns, as in eaux profondes (deep waters), idées profondes (profound ideas), or pensées profondes (deep thoughts). Because it is an adjective, its form changes to agree in gender and number with the noun it describes; the masculine plural is profonds and the feminine singular is profonde, while profonde s is used for feminine plural.
Profond derives from Old French profond, rooted in Latin profundus, meaning literally “pushed forward” or “deep.”
In science and nature writing, profonde is used for descriptive precision, for example: eaux profondes, cavités
Profondeur, profondeur (noun form for depth), profundité (synonym in French), profond, profonds.