Joe, Joan Frankel sang two Passover songs at today's singaround. I didn't join until after the first one, so I don't know what it was. The second was Adir Hu. Here are the lyrics from https://www.zemirotdatabase.org/view_song.php?id=117. There are other arrangements out there, mostly designed to make it go faster. The "beiso" in the first line of each stanza is the Ashkenazic pronunciation; the Sephardic is "beito". The "beiso" in the third line, I learned as "beitcha".

The song is an "acrostic", in that the Hebrew words adir, bachur, gadol, ..., when written in Hebrew, begin with the first, second, third, ..., letters of the Hebrew alphabet, aleph, bet, gimel, ....

There is some discussion of the song at https://en.wikipedia.org/wiki/Adir_Hu

I append a translation by Eve Levavi, also taken from the zemirot page linked above.

ADIR HU

Adir hu, adir hu, yivneh beiso bekarov.
Bimherah, bimherah, beyameinu bekarov.
El bneh, el bneh, bneh beiso bekarov.

Bachur hu, gadol hu, dagul hu yivneh beiso bekarov.
Bimherah, bimherah, beyameinu bekarov.
El bneh, el bneh, bneh beiso bekarov.

Hadur hu, vatik hu, zakai hu yivneh beiso bekarov.
Bimherah, bimherah, beyameinu bekarov.
El bneh, el bneh, bneh beiso bekarov.

Chassid hu, tahor hu, yachid hu yivneh beiso bekarov.
Bimherah, bimherah, beyameinu bekarov.
El bneh, el bneh, bneh beiso bekarov.

Kabir hu, lamud hu, melech hu yivneh beiso bekarov.
Bimherah, bimherah, beyameinu bekarov.
El bneh, el bneh, bneh beiso bekarov.

Norah hu, sagiv hu, izuz hu yivneh beiso bekarov.
Bimherah, bimherah, beyameinu bekarov.
El bneh, el bneh, bneh beiso bekarov.

Podeh hu, tzaddik hu, kadosh hu yivneh beiso bekarov.
Bimherah, bimherah, beyameinu bekarov.
El bneh, el bneh, bneh beiso bekarov.

Rachum hu, shadai hu, takif hu yivneh beiso bekarov.
Bimherah, bimherah, beyameinu bekarov.
El bneh, el bneh, bneh beiso bekarov.

(English translation by Eve Levavi)

He is mighty. May He rebuild His temple soon!
Speedily, speedily, in our days, soon!
God, build! God, build! Rebuild Your temple soon!
He is select.
He is great.
He is lofty.
He is glorious.
He is just.
He is blameless.
He is righteous.
He is pure.
He is singular.
He is powerful.
He is learned.
He is Sovereign.
He is radiant.
He is strong.
He is valorous.
He is salvific.
He is just.
He is holy.
He is merciful.
He is God.
He is commanding.

Information:

Translation by Eve Levavi. The translation is part of the work Haggadah for Pesah, an English Translation, hosted on the Open Siddur Project. The translation has not been modified by the Zemirot Database.

The translation is protected by the Creative Commons Attribution Share Alike 4.0 International License. This allows it to be shared on the Zemirot Database. Please read the terms of the license before sharing.