Inspirational

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Middle English (in the sense ‘divine guidance’): via Old French from late Latin inspiratio(n- ), from the verb inspirare (see inspire).

wiktionary

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inspiration +‎  -al

etymonline

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inspirational (adj.)

"tending to inspire," 1878; see inspiration + -al (1). Also "influenced by inspiration" (1839); "pertaining to inspiration" (1888). The adjective was used earlier in spiritualism. Earlier in the sense "tending to inspire" were inspirative (1770), inspiring (1640s).