⟨ZWSP⟩
No width, only permission: the line may break here, with no hyphen and no blank.
The zero width space pushes nothing apart — it merely tells the browser a break point exists there. Long URLs and run-together words split gracefully, gaining neither hyphen nor blank.
It is also a treacherous gem: invisible, it survives copy-and-paste and breaks searches and text comparisons. The named entity is ​; in HTML, the <wbr> element does the same trade.
Bare: stickybit.com.br/telemetria/inercial (bursts the box)
With ​: stickybit.com.br/​telemetria/​inercial (clean break)