Middle English; Old English -sum; akin to Gothic -sama, German -sam; seesame

-some2

1.

a collective suffix used with numerals:

twosome; threesome.
OriginExpand
Middle English -sum, Old English sum; special use of some (pronoun)

-some3

1.

a combining form meaning “body,” used in the formation ofcompound words:

chromosome.
Expand
Also, -soma.
OriginExpand
< Greek sôma body; see soma1
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Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for -someExpand

-some1

suffix

1.

characterized by; tending to: awesome, tiresome
Word Origin
Old English -sum; related to Gothic -sama, German -sam

-some2

suffix

1.

indicating a group of a specified number of members: threesome
Word Origin
Old English sum, special use of some (determiner)

-some3

/-səʊm/

combining form

1.

a body: chromosome
Word Origin
from Greek sōma body
Collins English Dictionary – Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for -someExpand

word-forming element used in making adjectives from nouns or adjectives(and sometimes verbs) and meaning “tending to; causing; to aconsiderable degree,” from Old English -sum, identical with som (see some ). Cf. Old Frisian -sum, German -sam, Old Norse -samr ; also related tosame.

suffix added to numerals meaning “a group of (that number),” e.g.twosome, from pronoun use of Old English sum “some” (see some ). Originally a separate word used with the genitive plural (e.g. sixa sum“six-some”); the inflection disappeared in Middle English and the pronounwas absorbed. Use of some with a number meaning “approximately” alsowas in Old English.

word-forming element meaning “the body,” Modern Latin, from Greeksoma “the body” (see somato- ).

2

suffix added to numerals meaning “a group of (that number),” e.g. twosome, from pronoun use of Old English sum “some” (see some). Originally a separate word used with the genitive plural (e.g. sixa sum “six-some”); the inflection disappeared in Middle English and the pronoun was absorbed. Use of some with a number meaning “approximately” also was in Old English.

3

word-forming element meaning “the body,” Modern Latin, from Greeksoma “the body” (see somato- ).

Online Etymology Dictionary, © 2010 Douglas Harper
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-some in MedicineExpand

-some suff.

  1. Body: centrosome.
  2. Chromosome: autosome.
The American Heritage® Stedman’s Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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