An Etymological Dictionary of Astronomy and Astrophysics

The act of making something wider. → instrumental broadening; → line broadening.

Etymology (EN): Broadening, from → broad + → -ing noun froming suffix.

Etymology (PE): Pahneš, from pahn (→ broad, present tense stem of pahnidan “to broaden” + -idan infinitive suffix) + eš verbal-noun suffix.