In my language column at Macmillan Dictionary, I’ve been writing about whether presently is ambiguous, as some authorities warn, and about the uses of and differences between till, until, and their abbreviations.
Ambiguity is presently unlikely shows my conclusion in the title, but the detail is worth examining. I’m usually reluctant to warn against using certain words or phrases, and so it is with presently in its primary sense of ‘currently’:
Bill Walsh, in Lapsing into a Comma, recommends avoiding it as a synonym for currently. So does R.L. Trask, in Mind the Gap. Harry Shaw, in his Dictionary of Problem Words and Expressions, calls the usage ‘inaccurate’, while Garner’s Modern English Usage finds it ‘poor’ because it causes ambiguity. . . .
[But] if I tell you that something is happening presently, you’ll naturally infer that it’s happening now. If I tell you it will happen presently, you’ll infer that it will happen in the near future. The verb tense and the broader context tend to establish what is meant.
The difference between till and until is something I’ve been asked about a few times over the years. In TIL about till and until, I sort out these synonyms and related forms, describing how they differ, how they don’t, where you can use them, and which ones to avoid. There’s also a bit of history:
People often assume that till is simply an abbreviation of until, but in fact till is a few centuries older. It shows up in the runic inscription on the ancient Ruthwell Cross in Scotland, where its original sense was the same as ‘to’.
There is an abbreviation of until: ’til. Some critics reject it, because we already have till. They may even call it incorrect. ’Till is still more disparaged, because the apostrophe is superfluous, and although this form was used by George Washington, of all people, I can’t recommend it. Apostrophe-less til is occasionally used, but spelling-wise it falls between the two stools of till and ’til.