horse chestnut, (kokuji)
栃 refers specifically to the horse chestnut tree or its nut. It is a kokuji (a kanji created in Japan) and has no extended abstract meanings.
栃 is a Japanese kokuji created by combining 木 (tree) with 厉, which likely represents the sound とち or a variant of 櫔 (horse chestnut). The exact origin of the right component is uncertain.
A tree 木 with a distinctive right side 厉 that looks like a chestnut burr: imagine a horse chestnut hanging from the branches.
For とち, think of touching a horse chestnut: touch -> とち, and the tree is full of them.
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Tochigi (city, prefecture)
chestnut
Tochigi Prefecture (Kanto area)
Tochigi Prefectural Museum of Fine Arts
Tochigi Prefectural Police (abbr)
dark chestnut (horse coat color)
Tochinishiki and Wakanohana I (dominant 1950s yokozuna)
era during the 1950s dominated by grand champions Tochinishiki and Wakanohana I
Japanese ginseng (Panax japonicus)
cake made from pounded horse chestnuts and mochi rice
noodles made from regular flour and horse chestnut flour
rolling pin for making horse chestnut noodles
horse chestnut (Aesculus hippocastanum); conker tree