ear
耳 centers on the physical ear and its function of hearing.
耳 is a pictograph of an ear, with the modern form preserving the outer shape and inner details of the ear.
The shape of 耳 looks like an ear: the outer frame is the ear's outline, and the inner strokes are the folds and canal. See it as an ear.
For ジ, imagine a giant ear listening to jazz music: jazz -> ジ, and the ear hears every note.
ear
something heard for the first time; hearing something for the first time
close to the ear
to control; to take the lead in; to have under one's thumb
tinnitus; ringing in the ears
earpick
nose and ears
mishearing
hard (on the ears); offensive (to the ear); rasping; rough; harsh; grating; jarring; cacophonous
otorhinolaryngology; otolaryngology; ear, nose and throat department
inner ear
one ear
earlobe
straining one's ears
cloud ear mushroom (Auricularia auricula-judae); wood ear mushroom; Jew's ear mushroom
something heard while sleeping
whispering into a person's ear
eyes and ears; seeing and hearing
otitis media; middle-ear infection
earring