intransitive. To become pale.

intransitive. Of the face, cheek, etc.: to blanch, grow pale. Of the hair: to turn white or grey.

intransitive. To turn pale.

intransitive. To grow pale or dim; to lose colour or brightness; to become pale in comparison. Now esp.: to become pale in the face from shock or…

To grow pale. poetic.

intransitive. To become white, whiten; to become pale, pallid, or colourless.

intransitive. To turn or become white (chiefly by loss of colour); to bleach; to pale.

intransitive. Of a colour, something coloured: to become paler; to fade.

To grow pale; to fade.

(un-, prefix2 affix 1.)

intransitive. To assume a sickly appearance.