12. AR'BOR, ar'boris, a tree.
arbor: ar'bor, a lattice-work covered with vines, etc., a bower; -et, a little tree; -ist, -escent, -(e)ous; arbore'tum, a place where specimens of trees are cultivated; arboricult'ure (-ist).
13. AR'MA, arms, weapons.
arm: arm (n. and v.); arms, weapons; -or, defensive weapons; ar'morer; ar'mory; armo'rial, belonging to the escutcheon or coat of arms of a family; ar'mistice (sis'tere, to cause to stand still); disarm'; unarmed'.
Arma'da (Span, n.), a naval warlike force; ar'my (Fr. n armée); ar'mament (Lat. n. armamen'ta, utensils); armadil'lo (Span, n.), an animal armed with a bony shell.
ARS. (See [page 28.])
14. ARTIC'ULUS, a little joint.
articul: -ate (v., to utter in distinctly jointed syllables), -ate (adj. formed with joints), -ation; inartic'ulate; ar'ticle (Fr. n. article).
15. AS'PER, rough.
asper: -ate, -ity; exas'perate; exas'peration.