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spatial [spatial 词源字典]: spatial: see space
[spatial etymology, spatial origin, 英语词源]
expatiate (v.): 1530s, "walk about, roam freely," from Latin expatiatus/exspatiatus, past participle of expatiari/exspatiari "wander, digress, wander from the way; spread, extend," from ex- "out" (see ex-) + spatiari "to walk, spread out," from spatium (see space (n.)). Meaning "talk or write at length" is 1610s. Related: Expatiated; expatiating.
expatiation (n.): 1610s, noun of action from expatiate.
spatial (adj.): 1840 (spacial is from 1838), "occupying space," from Latin spatium + adjectival suffix -al (1); formed in English as an adjective to space (n.), to go with temporal. Meaning "of or relating to space" is from 1857. Related: Spatially.