Old Irish class B II verbs (Strachan's A3, McCone's S2) are derived from Proto-Celtic verbs ending in *-yeti, which are derived from Proto-Indo-European verbs ending in *-yeti or *-yéti and correspond to the Latin third conjugationi-stems (e.g. speciō) and Sanskrit class 4 verbs (e.g. पश्यति(paśyati)). The final consonant of the stem is palatalized throughout, meaning that any consonant-initial endings also start with a palatalized consonant.
The endings of the class are the same as for class A II, except for the third-person singular conjunct nondeponent, which ends in the stem-final consonant, not in -i as in the weak conjugation.
A sample verb for this class is gaibid(“to hold, take”). The endings are as follows:
Present indicative
1st sg.
2nd sg.
3rd sg.
1st pl.
2nd pl.
3rd pl.
Passive singular
Passive plural
Absolute
gaibiu / gaibim
gaibi
gaibid
gaibmi
gaibthe
gaibit
gaibthir
gaibtir
Conjunct
·gaibiu / ·gaibim
·gaibi
·gaib
·gaibem
·gaibid
·gaibet
·gaibther
·gaibter
Relative
gaibes
gaibme
gaibte
gaibther
gaibter
Imperfect indicative
1st sg.
2nd sg.
3rd sg.
1st pl.
2nd pl.
3rd pl.
Passive singular
Passive plural
·gaibinn
·gaibthea
·gaibed
·gaibmis
·gaibthe
·gaibtis
·gaibthe
·gaibtis
Imperative
2nd sg.
3rd sg.
1st pl.
2nd pl.
3rd pl.
Passive singular
Passive plural
gaib
gaibed
gaibem
gaibid
gaibet
gaibther
gaibter
See Appendix:Old Irish delenition for the change of ending-initial ⟨th⟩ to ⟨t⟩ after certain consonants. An example of a verb with widespread delenition is guidid(“to pray”):
Present indicative
1st sg.
2nd sg.
3rd sg.
1st pl.
2nd pl.
3rd pl.
Passive singular
Passive plural
Absolute
guidiu / guidim
guidi
guidid
guidmi
guidte[ˈɡutʲe]
guidit
guitir[ˈɡutʲirʲ]
guitir[ˈɡudʲirʲ]
Conjunct
·guidiu / ·guidim
·guidi
·guid
·guidem
·guidid
·guidet
·guiter[ˈɡutʲer]
·guiter[ˈɡudʲer]
Relative
guides
guidme
guite[ˈɡudʲe]
guiter[ˈɡutʲer]
guiter[ˈɡudʲer]
Imperfect indicative
1st sg.
2nd sg.
3rd sg.
1st pl.
2nd pl.
3rd pl.
Passive singular
Passive plural
·guidinn
·guitea[ˈɡutʲa]
·guided
·guidmis
·guite[ˈɡutʲe]
·guitis[ˈɡudʲisʲ]
·guite[ˈɡutʲe]
·guitis[ˈɡudʲisʲ]
Imperative
2nd sg.
3rd sg.
1st pl.
2nd pl.
3rd pl.
Passive singular
Passive plural
guid
guided
guidem
guidid
guidet
guiter[ˈɡutʲer]
guiter[ˈɡudʲer]
Depalatalization can be found in the prototonic forms of complex verbs, where syncope brings a nonpalatalized consonant into contact with a palatalized consonant, causing the entire cluster to be nonpalatalized. An example is the prototonic forms of fo·daim(“to endure, allow”):
A sample verb for this class is midithir(“to judge”). As with class A II, the deponent verbs of this class take a linking vowel between the stem and many of the endings. The endings are as follows:
