The process of developing freckles or becoming marked with freckles, typically from sun exposure.
From 'freckle' (Middle English, from Old Norse 'freknur') combined with the gerund suffix '-ing'. The word evolved from Scandinavian origins where the spotted marking pattern was first named.
Freckling is actually a protective response—your skin is producing extra melanin in spots to shield itself from UV damage, which is why fair-skinned people freckle more in summer. It's basically your skin's way of saying 'too much sun!'
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