Merriam-Webster's Dictionary and Thesaurus - Merriam-Webster [1345]
Antonyms
boorish, churlish, clownish, loutish, uncouth
1sub noun : a person or thing that takes the place or function of another : SUBSTITUTE
2sub noun 1 : a naval vessel designed to operate underwater : SUBMARINE
2 : a large sandwich on a long split roll with any of a variety of fillings : SUBMARINE
3sub abbreviation 1 subtract
2 suburb
4sub verb : to serve as a substitute
Synonyms
cover, fill in, pinch-hit, stand in, substitute, take over—more at COVER
sub- prefix 1 : under : beneath
2 : subordinate : secondary
3 : subordinate portion of : subdivision of
4 : with repetition of a process described in a simple verb so as to form, stress, or deal with subordinate parts or relations
5 : somewhat
6 : falling nearly in the category of : bordering on
List of self-explanatory words with the prefix sub-:
subacute
subagency
subagent
subaqueous
subarctic
subarea
subatmospheric
subaverage
subbasement
subcategory
subcellular
subchapter
subclass
subclassify
subcommittee
subcontract
subcontractor
subculture
subcutaneous
subdiscipline
subentry
subfamily
subfield
subfreezing
subgenre
subgenus
subgroup
subhead
subheading
subhuman
subkingdom
sublethal
subliterate
subminimal
subminimum
suboptimal
suborder
subparagraph
subparallel
subphylum
subplot
subpopulation
subproblem
subprofessional
subprogram
subregion
subroutine
subsection
subsense
subsoil
subspecies
substage
substation
subsystem
subteen
subthreshold
subtopic
subtotal
subtreasury
subtype
subunit
subvariety
subvisible
subzero
sub·al·pine adjective 1 : of or relating to the region about the foot and lower slopes of the Alps
2 : of, relating to, or inhabiting high upland slopes esp. just below the timberline
sub·al·tern noun : SUBORDINATE; especially : a junior officer (as in the British army)
sub·as·sem·bly noun : an assembled unit to be incorporated with other units in a finished product
sub·atom·ic adjective : of or relating to the inside of the atom or to particles smaller than atoms