teeth to harden
teeth to harden this New Year's meal...not even one
-Issa Year unknown
歯固めの 新年の食事 一つなし
hagatame no sinnen no syokuji hitotu nasi
katamu beki ha ippon mo nakari keri
Similar haiku of teeth hardening
imitating others hardening their teeth tofu for me
The "for me" has been added. Issa is referring to the New Year's tooth-hardening meal. He (or someone) is toothless and so must resort to tofu for the occasion.
I don't know and don't hear the custom of teeth hardening.
That would be done on the New Year's meal.
Issa has lost all his teeth at the age of 50 years old . The last tooth has been lost at Futtu .Issa wrote this haiku with his sneering at himself.