Ephemeral Light

My favorite time of the day, when the fleeting sunlight is shining through the windows and creating patterns on the wall

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e⋅phem⋅er⋅al  /ɪˈfɛmərəl/ [i-fem-er-uhl]
–adjective
1. lasting a very short time; short-lived; transitory: the ephemeral joys of childhood.
2. lasting but one day: an ephemeral flower.

–noun
3. anything short-lived, as certain insects.

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Origin:
1570–80; < Gk ephmer(os) short-lived, lasting but a day (ep- ep- + hēmér(a) day + -os adj. suffix) + -al 1

Related forms:

e⋅phem⋅er⋅al⋅ly, adverb
e⋅phem⋅er⋅al⋅ness, noun

Synonyms:
1. fleeting, evanescent, transient, momentary, brief.

Antonyms:
1. permanent.