-al

-al

1
a suffix with the general sense “of the kind of, pertaining to, having the form or character of” that named by the stem, occurring in loanwords from Latin (autumnal; natural; pastoral ), and productive in English on the Latin model, usually with bases of Latin origin (accidental; seasonal; tribal ). Originally, -al1 was restricted to stems not containing an -l- (cf. ar-1. ); recent lapses in this rule have produced semantically distinct pairs, as familiar and familial.
Compare -ical, -ial.


Origin:
< Latin ālis, -āle; often replacing Middle English -el < Old French

Dictionary.com Unabridged

-al

2
a suffix forming nouns from verbs, usually verbs of French or Latin origin: denial; refusal.

Origin:
< Latin -āle (singular), -ālia (plural), nominalized neuter of -ālis -al1; often replacing Middle English -aille < Old French < Latin -ālia

-al

3
Chemistry. a suffix indicating that a compound contains an aldehyde group: chloral.

Origin:
presumed to be short for aldehyde

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
-al1
 
suffix forming adjectives
of; related to; connected with: functional; sectional; tonal
 
[from Latin -ālis]

-al2
 
suffix forming nouns
the act or process of doing what is indicated by the verb stem: rebuttal; recital; renewal
 
[via Old French -aille, -ail, from Latin -ālia, neuter plural used as substantive, from -ālis-al1]

-al3
 
suffix forming nouns
1.  indicating an aldehyde: ethanal
2.  indicating a pharmaceutical product: phenobarbital
 
[shortened from aldehyde]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

-al
suffix forming adjectives from nouns or other adjectives, "of, like, related to," M.E. -al, -el, from O.Fr. or directly from L. -alis (see -al (2)).

-al
suffix forming nouns of action from verbs, mostly from Latin and French, meaning "act of ______ing" (e.g. survival, removal), M.E. -aille, from Fr. fem. sing. -aille, from L. -alia, neut. pl. of adj. suffix -alis, also used in English as a noun suffix. Nativized in English and used with Germanic verbs
(e.g. bestowal, betrothal).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

-al 3
suff.
Aldehyde: butyral.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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