a crab (infraorder Brachyura)

crab

world / a metaphorical world (how one lives one's life) / society, the times / a realm, a circle, a sphere / (Buddhism) the four inner realms of 須弥山 (Shumisen) / (Buddhism) realm governed by a buddha

(physics) Mach

final period; terminal period; last stage. / (illness): terminal; approaching death.

prefixes nouns, adjectives or adjectival nouns for intensification; really; truly; totally; completely

kind, sort, type, class, genus, order, family / similar example, parallel

kind, sort, type, the like / a similar thing, parallel / (taxonomy) a conventional grouping that corresponds to a class or an order / (logic) Short for 類概念 (ruigainen).

sort, kind, type

maximization