The noun has 3 meanings:
Meaning #1:
the process of becoming softened and saturated as a consequence of being immersed in water (or other liquid)
Synonyms: soak, soakage
Meaning #2:
the act of making something completely wet
Synonyms: drenching, souse, sousing
Meaning #3:
washing something by allowing it to soak
Synonym: soak
The adjective soaking has one meaning:
Meaning #1:
wet through and through; thoroughly wet
Synonyms: drenched, saturated, soaked, sodden, sopping, soppy
The adverb soaking has one meaning:
Meaning #1:
extremely wet
Synonyms: sopping, dripping
