attack, advance on, succeed to, pile, heap
襲 centers on a forceful, layered action: attacking or advancing on someone, and by extension, succeeding to a role or piling things up in a stacked, overlapping manner.
襲 combines 龍 (dragon) and 衣 (clothing), originally suggesting a dragon robe or layered garment, which extended to ideas of piling up, succeeding, and attacking in waves.
A dragon (龍) wearing layered clothing (衣) attacks by piling on top of its prey, succeeding in its advance.
For シュウ, imagine a dragon in a shoe store attacking a pile of shoes: shoe -> シュウ, and the dragon piles them up.
to attack; to assail; to make an assault; to strike; to hunt down
(surprise) attack; assault; raid; charge
air-raid
invasion; raid; attack; visitation (of a calamity)
counterattack
surprise attack
heredity; heritage
following (a precedent, former policy, etc.); continuing with; sticking to; observing
assault; violent attack
raid; assault; descent
(incoming) attack; raid; invasion; assault
to attack; to go for; to come at; to pounce on; to jump on; to swoop down on
succession to another's professional name
invasion; infestation
night attack; nocturnal assault
enemy attack; enemy raid
Doolittle raid
garment worn under the hanpi undergarment or hō robe in court ceremonial dress
hereditary system; hereditary succession
hereditary