somedeal adv.

Middle English som, "someone, somebody, a certain person; a certain indefinite portion of something, some part," from Old English sum "some, a, a certain one, something, a certain quantity; a certain indefinite number" (as in some say). This is from Proto-Germanic *sumaz (source also of Old Saxon, Old Frisian, Old High German sum, Old Norse sumr, Gothic sums), from a suffixed form of PIE root *sem- (1) "one; as one, together with."

The word has had greater currency in English than in the other Teutonic languages, in some of which it is now restricted to dialect use, or represented only by derivatives or compounds .... [OED]

For substitution of -o- for -u-, see come. As a pronoun from c. 1100, "a certain quantity or number." A possessive form is attested from 1560s but remains rare. Use as a quasi-adverb before numerals began in Old English, originally "out of" (as in sum feowra "one of four").

The sense of "in some degree, to some extent" is American English, by 1745. The meaning "remarkable, quite a" is attested from 1808, American English colloquial.

Many combination forms (somewhat, sometime, somewhere) were in Middle English but often written as two words before 17-19c. Somewhen is rare and since 19c. used almost exclusively in combination with the more common compounds; somewho "someone" is attested from late 14c. but did not endure. Somewhy appeared occasionally in 19c. Scott (1816) has somegate "somewhere, in some way, somehow," and somekins or somskinnes "some kind of a" is recorded from c. 1200.

Get some "have sexual intercourse" is attested 1899 in an anecdote of Abe Lincoln from c. 1840.

"a part or portion," Middle English del, from from Old English dæl "a part of a whole, a share;" with qualification (great, etc.), "an extent, degree, quantity, amount," from Proto-Germanic *dailaz (source also of Old Norse deild, Old Frisian del "part; juridical district," Dutch deel, Old High German and German teil, Gothic dails "part, share, portion"), from PIE *dail- "to divide" (source also of Old Church Slavonic delu, Lithuanian dalis "part"), ‌‌perhaps a Northern Indo-European extended form of the root *da- "to divide," or perhaps a substratum word.

Formerly used in many senses now taken by part. Meaning "a share (of something), one's allotted portion" is from c. 1200. Business sense of "transaction, bargain" is 1837, originally slang, from the older sense of "arrangement among a number of persons for mutual advantage." In American history, New Deal is from Franklin D. Roosevelt's speech of July 2, 1932 (the phrase itself is by 1834). Big deal is from 1928 as "important transaction;" ironic use first recorded 1951 in "Catcher in the Rye." Deal-breaker is attested by 1975.

c. 1200, "in a certain amount, to some measure or degree," from some + what. As a noun, early 13c. as "something that is not specified;" late 13c. as "more or less, a little." Replaced Old English sumdæl, sume dæle "somewhat, some portion," literally "some deal" (see somedeal).