drown, indulge
溺 centers on being overwhelmed by something, whether physically submerged in water (drowning) or metaphorically lost in a desire or habit (indulging). Both senses share the idea of losing control and being pulled under.
溺 combines 氵 (water) with 弱, which likely contributes both sound and the idea of weakness or yielding. The character suggests being overcome by water, leading to drowning, and by extension being overcome by desires.
Water 氵 on the left and weakness 弱 on the right: imagine a weak swimmer being pulled under by the water, drowning. That same weakness can also mean indulging too much in something, like being swept away by a craving.
For デキ, picture a deck of a ship sinking as someone drowns: deck -> デキ, and the water pulls them under.
to struggle in the water; to sink below the surface and become unable to breathe; to (nearly) drown
infatuation; adoration; blind love; doting (on a child)
death by drowning
indulgence (in alcohol, women, etc.); debauchery; dissipation
death by drowning
indulgence; addiction; infatuation
being immersed in water; being drowned
to drown
a drowning man will clutch at a straw
to come near being drowned
to die by drowning; to drown
drowned valley; ria
to drown; to get addicted; to become infatuated
drowned body
drowned person
drowning
craft brings nothing home; the crafty schemer drowns in his own scheme
a fast (dissolute) life; a life of follies; a life given to dissolute pleasures