cadō, _fall_ cadere cecidī -cāsus
Compounds have #i# for #a# in the present system: as, #oc-cidō#,
#oc-cidere#, #oc-cidī# (860), #oc-cāsus#. Rarely #e# in the present and
perfect systems (Enn., Lucr., Varr.): as, #ac-cedere#, #ac-cedisset#
(109). For the perfect of #re-cidō#, see 861.
caedō, _fell_, _cut_ caedere cecīdī caesus
Compounds have #ī# for #ae#: as, #ac-cīdō#, #ac-cīdere#, ac-cīdī (860),
#ac-cīsus#.
parcō, _spare_ parcere pepercī ----
#pepercī#, &c. (regularly in Cic., Caes., Hor., Ov., Mart.; Nep. once;
also Plaut. twice, Ter. once). Old #parsī#, &c. (Plaut. 8, Cato, Ter.,
Nov., Nep., once each); once #parcuit# (Naev.). Compounds: #com-perce#
(Plaut.), #con-parsit# (Ter.), #in-perce#, #im-percitō#, #re-percis#
(Plaut.), #re-parcent# (Lucr.).
pendō, _weigh_, _pay_ pendere pependī pēnsus
931. (_b._) With the present stem in a nasalized root followed by
#{-o|e-}# (831).
tundō, _pound_ tundere tutudī not used tūnsus
For the perfect of #re-tundō#, see 861; other compounds have the perfect
#-tudī# (861), but once #con-tūdit# (Enn.). Perfect participle, #tūsus#
(Plin., Mart.); compounds: #con-tūnsus# (Plin.), #con-tūsus# (Cato,
Varr., Caes., Lucr., Sal., Verg., &c.); #ob-tūnsus# (Plaut., Verg.,
Liv., Sen.), #op-tūsus#, #ob-tūsus# (Lucr., Sen., Quintil., Tac.);
#per-tūssus# (Plaut.), #per-tūsus# (Cato, Lucr., Liv., Sen., &c.);
#re-tūnsus# (Plaut., Verg.), #re-tūsus# (Cic., Lucr., Hor.); #sub-tūsus#
(Tib.).