Non-coming

[…] and inasmuch as the husband does not now come, which non-coming shall be adjudged a default, we pray that they be distrained to attorn.

Source: wiktionary

This poem is about non-coming and non-going.

Source: wiktionary

Beginning at the end, ending at the beginning, the comings and goings—the non-comings, the non-goings— of Estragon and Vladimir settling onto boots, and swollen feet; a very precise picture of pain.

Source: wiktionary