menguar
Meanings
Verb
1. to wane (intransitive)
2. to decrease, diminish (intransitive)
Examples2
Su entusiasmo rápidamente se menguó.
His enthusiasm quickly waned.
Menguará la luna para hacerle una cuna
On nights with a full moon
It's because the child is in a good mood
And if the child does weep
The moon wanes, making a cradle for him