Etymology
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immaterial (adj.)
c. 1400, "spiritual, incorporeal, not consisting of matter," from Medieval Latin immaterialis "not consisting of matter, spiritual," from assimilated form of in- "not, opposite of" (see in- (1)) + Late Latin materialis "of or belonging to matter" (see material (adj.)). Sense of "unimportant, of no consequence" is first recorded 1690s from material (adj.) in its meaning "important" (16c.). Related: Immaterially (late 14c.); immateriality.
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matterless (adj.)
late 14c., "insubstantial, immaterial, without physical substance," from matter (n.) + -less. From 1610s as "devoid of sense or meaning."
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pet (adj.)

1580s, of an animal, "fondled and indulged," from pet (n.1). Of a thing, material or immaterial, "favored, favorite," by 1826.

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fruitful (adj.)
c. 1300, of trees, from fruit + -ful. Related: Fruitfully; fruitfulness. Of animals or persons from early 16c.; of immaterial things from 1530s.
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ethereal (adj.)
formerly also etherial, 1510s, "of the highest regions of the atmosphere," from ether + -ial; extended sense of "light, airy" is from 1590s. Figurative meaning "spirit-like, immaterial" is from 1640s. Related: Ethereally.
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flexibility (n.)
1610s, of physical things, from French flexibilité (in Old French, "weakness, vacillation") or directly from Late Latin flexibilitatem (nominative flexibilitas), from Latin flexibilis "pliant, yielding" (see flexible). Of immaterial things from 1783.
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ramification (n.)

1670s, "a branching out, a structure like or analogous to the branches of a tree," from French ramification, from ramifier (see ramify). Transferred sense of "outgrowth, consequence," in reference to immaterial things, is attested by 1755. Related: Ramifications.

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ratchet (v.)

1852, "move by means of a ratchet," from ratchet (n.). Transferred sense "cause something (immaterial) to move (up or down) in jerky increments, as if by ratchet" is attested by 1977. Related: Ratcheted; ratcheting.

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incoherent (adj.)
1620s, "without coherence" (of immaterial or abstract things, especially thought or language), from in- (1) "not, opposite of" + coherent. As "without physical coherence" from 1690s. Related: Incoherently.
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sprite (n.)
c. 1300, "Holy Ghost," from Old French esprit "spirit," from Latin spiritus (see spirit (n.)). From mid-14c. as "immaterial being; angel, demon, elf, fairy; apparition, ghost."
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