Etymology
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riderless (adj.)

"having no rider," by 1766, from rider + -less.

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wordless (adj.)
c. 1200, from word (n.) + -less. Related: Wordlessly.
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valueless (adj.)
1590s, from value (n.) + -less. Related: Valuelessness.
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Christless (adj.)

"having no faith in Christ, unchristian," 1650s, from Christ + -less.

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hornless (adj.)
late 14c., of animals; 1907 of phonograph players, from horn (n.) + -less.
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dinnerless (adj.)

"having no dinner," 1660s, from dinner + -less.

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ownerless (adj.)

"having no owner," 1792, from owner + -less.

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scoreless (adj.)

in games or contests, "having no score," 1880, from score (n.) + -less.

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shadowless (n.)

1630s, from shadow (n.) + -less. "Having no shadow," hence, sometimes, "weird, supernatural."

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