973. (_b._) With reduplication and #{-o|e-}# in the present stem (829).

gignō, _beget_ gignere genuī genitus

Present sometimes also without reduplication, #genit#, &c. (Varr.,

Lucr.).

974. (_c._) With the present stem in a nasalized root followed by

#{-o|e-}# (831).

ac-cumbō, _lie by_ ac-cumbere ac-cubuī ac-cubitus

So also #in-cumbō#; #dis-cumbō# has #dis-cubuī#, #dis-cubitum#.

Compounds with #dē#, #ob#, #prō#, #re-#, and #sub#, have #-cubuī#,

#----#.