noceo nocere nocui nocitum (est) injure pareo parere parui pariturus obey placeo placere placui placiturus please taceo tacere tacui taciturus be silent terreo terrere terrui territus frighten valeo valere valui valiturus be strong

NOTE 1.—­The following lack the Participial Stem:—­
egeo        egere       egui        ——­             want
emineo      eminere     eminui      ——­             stand forth
floreo      florere     florui      ——­             bloom
horreo      horrere     horrui      ——­             bristle
lateo       latere      latui       ——­             lurk
niteo       nitere      nitui       ——­             gleam
oleo        olere       olui        ——­             smell
palleo      pallere     pallui      ——­             be pale
pateo       patere      patui       ——­             lie open
rubeo       rubere      rubui       ——­             be red
sileo       silere      silui       ——­             be silent
splendeo    splendere   splendui    ——­             gleam
studeo      studere     studui      ——­             study
stupeo      stupere     stupui      ——­             be amazed
timeo       timere      timui       ——­             fear
torpeo      torpere     torpui      ——­             be dull
vigeo       vigere      vigui       ——­             flourish
vireo       virere      virui       ——­             be green
and others.

      NOTE 2.—­The following are used only in the Present System:—­

aveo avere ——­ ——­ wish
frigeo frigere ——­ ——­ be cold
immineo imminere ——­ ——­ overhang
maereo maerere ——­ ——­ mourn
polleo pollere ——­ ——­ be strong

                                        and others.

b.  Type -eo, -ere, -ui, -tus (-sus).

censeo censere censui census estimate
doceo docere docui doctus teach
misceo miscere miscui mixtus mix
teneo tenere tenui ——­ hold
So contineo and sustineo; but—­
retineo retinere retinui retentus retain
obtineo obtinere obtinui obtentus maintain
torreo torrere torrui tostus bake

III.  PERFECT IN -SI.