hermit, wizard, cent
仙 centers on a person who has transcended ordinary life: a hermit living in remote mountains, or a wizard with supernatural powers. The rare 'cent' meaning is a phonetic borrowing unrelated to the core idea.
仙 combines 亻 (person) and 山 (mountain), suggesting a person who withdraws to the mountains to become a hermit or immortal. This is a standard semantic-component explanation.
A person 亻 beside a mountain 山: imagine a hermit or wizard living alone in the mountains, away from the world.
For セン, picture a hermit sending a message from the mountain: send -> セン, and the hermit sends wisdom down to the village.
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Sendai (city in Miyagi)
immortal mountain wizard (in Taoism); mountain man (esp. a hermit)
daffodil (esp. Narcissus tazetta var. chinensis); narcissus
great (waka) poet; immortal poet
sacrum; sacral bone
immortal mountain wizard (in Taoism); Taoist immortal; supernatural being
fairy; nymph; elf
dwelling place of hermits; pure land away from the world
meisen silk
(garden) balsam (Impatiens balsamina); touch-me-not
Hosen College of Childhood Education
wild daffodil (Narcissus pseudonarcissus); Lent lily
trident dagger
the thirty-six immortal poets (of the Heian period; as named by Fujiwara no Kintō)
hermit; wizard
elixir (of life)
cactus
love-lies-bleeding (Amaranthus caudatus); tassel flower; velvet flower; foxtail amaranth
sweet autumn clematis (Clematis terniflora)
Sendai Sun Plaza (hotel)