Plipio.

Per th' O.L.D.:––

plipio ~are, intr. [onomat.] (Vb. expr. the cry of the hawk.)
     acciptrum (est) ~are Suet.fr.161(p.251Re).

     Perhaps one should be ashamed if his first acquaintance with a verb is in the dictionary, and not in the texts, but I feel absolved that the word appears only once, in a fragment of Suetonius.  But when one comes across such gems as this, he is seized with the urge to run through all the conjugations, wondering, How many others have said plipiaveris ('you will have made the hawk sound').  I will run through them as fast as I can.  (I cannot, unfortunately, see how it would make sense in the passive voice, and so will use only the active.)  I count 69 distinct forms, 70 if I may say that I am about to add the fut.inf.act. (joke).

     Listing anything with Bachian or Plinian thoroughness gives one a sense of total possession. That is the only reason for this exercise I can conceive.

IND.

pres.ind.act.
plipio
plipias
plipiat
plipiamus
plipiatis
plipiant.

fut.act.
plipiabo
plipiabis
plipiabit
plipiabimus
plipiabitis
plipiabunt.

fut.perf.act./perf.subj.act.
plipiavero/plipiaverim
plipiaveris
plipiaverit
plipiaverimus
plipiaveritis
plipiaverint.

perf.ind.act.
plipiavi
plipiavisti
plipiavit
plipiavimus
plipiavitis
plipiaverunt/plipiavere.

imp.ind.act.
plipiabam
plipiabas
plipiabat
plipiabamus
plipiabatis
plipiabant.

plup.ind.act.
plipiaveram
plipiaveras
plipiaverat
plipiaveramus
plipiaveratis
plipiaverant.

SUBJ.

pres.subj.act
plipiem
plipies
plipiet
plipiemus
plipietis
plipient.

perf.subj.act
(see above)

imp.subj.act.
plipiarem
plipiares
plipiaret
plipiaretis
plipiaremus
plipiarent.

plup.subj.act.
plipiavissem
plipiavisses
plipiavisset
plipiavissemus
plipiavissetis
plipiavissent.

IMPER.

pres.imper.act.
plipia
plipiate.

fut.imper.act.
plipiato (2nd & 3rd .sg.)
plipiatote (2nd.pl)
plipianto (3rd.pl).

INF.

pres.act.inf.
plipiare.

fut.act.inf. 
plipiaturus esse.

perf.act.inf.
plipiavisse.

PART.

pres.act.
plipians.

fut.act.
plipiaturus.

GER.

gen.
plipipandi.

acc.
plipiandum.

abl.
plipiando.

SUP.

acc.
plipiatum.

abl.
plipiatu.