@ScribblerAnd since we're on the subject, on "today" plus one let me tell you about orphaned words.
An orphaned word is a word that has become so rare as to be obsolete, archaic, or entirely gone from the language, but which has derivative words which are still in use.
Common examples are disgruntled, reckless, and unkempt.
The word "gruntled" meant to be grumbly or upset, with "disgruntled" an enhancement of that, the dis- being used not as a negative but meaning "very". Gruntled fell out of regular usage so long ago that we don't even know what the original root was.
"Reckless" is even more interesting. Reckless obviously means without reck. Reck means to pay heed to or to be important, so reckless means to not pay attention to. It comes from the Old English word "reccan" meaning to explain or narrate.
What's interesting is that despite having a similar sound and meaning as "recount" (meaning remember or tell), they come from completely different roots. Reck comes from the proto-West Germanic rekkjan, while Recount comes from the same French-Latin root that we get the word "compute" from: computare > compte > counte.