hair shirt
US /ˈher ˌʃɜrt/
UK /ˈher ˌʃɜrt/

1.
cilicio
a shirt made of coarse animal hair, worn next to the skin as a penance or mortification of the flesh
:
•
In medieval times, some ascetics wore a hair shirt to demonstrate their devotion.
En la Edad Media, algunos ascetas usaban un cilicio para demostrar su devoción.
•
The monk's severe penance included wearing a rough hair shirt.
La severa penitencia del monje incluía usar un áspero cilicio.
2.
carga, fuente de molestia constante
something that causes constant discomfort or annoyance, especially as a self-imposed burden
:
•
His constant worrying about trivial matters was a real hair shirt for him.
Su constante preocupación por asuntos triviales era un verdadero cilicio para él.
•
Living with such strict self-imposed rules became a kind of hair shirt.
Vivir con reglas autoimpuestas tan estrictas se convirtió en una especie de cilicio.