adelgaçar

From a- +‎ delgaçar, from Vulgar Latin *dēlicātiāre, from Latin dēlicātus (“tender; delicate”).

adelgaçar (first-person singular present adelgaço, first-person singular preterite adelgacei, past participle adelgaçado)

1. (transitive) to thin (make thin or thinner)

   Synonyms: afinar, delgaçar

   Antonyms: engrossar, espessar

2. (intransitive) to thin (become thin or thinner)
3. (transitive) to make lean or leaner, less fat

   Synonym: emagrecer

   Antonym: engordar

4. (intransitive) to become lean or leaner

   Synonym: emagrecer

   Antonym: engordar

5. (intransitive, of fog, a cloud, a shadow, etc.) to become less dense

   Antonym: engrossar

6. (figurative) to hone (refine or master a skill)

   Synonym: aguçar