Morpheme
Labo(u)r [Labor, Labour]
Type
free base
Denotation
work, toil, exertion
Etymology
Latin labor; Old Latin labōs
Evidence
belabor, elaborate, elaborated, elaborately, elaborates, elaborating, elaboration, elaborator, inelaborate, labor, laboral, labored, laborer, laboress, laboring, laborious, laborist, laborless, laborlore, labors, labour, laboured, labouring, labourite, labours, microlabor, nonlabor, overelaborate, overlabor, prelabor, unelaborate
Notes
<r> does not double because the stress falls on the first syllable
