enrarecer
verbo transitivo Conjugaison
| 1. | [contaminar] Conjugaison to pollute |
| 2. | [rarificar] to rarefy |
enrarecerse
verbo pronominal
| 1. | [contaminarse] to become polluted |
| 2. | [rarificarse] to become rarefied |
| 3. | (figurado) [situación, ambiente] to become tense |
