How to pronounce “fleck”(verb) in English

This is Korobi's voice."I'm swimming through a long underwater cavern flecked with blue light-- the cavern of love, with Rajat close behind me.We're in a race, and so far I'm winning, because this is my dream.

old Ivory and a mass of curly laca black hair that tumbled over his forehead and into his eyes the pupils of his eyeswere as dark as his hair except that they were flecked with Sparks of Hazel as a child strangers were apt to saythat a pair of twinklers like his could be sold as diamonds to a duchess later when it came time for him to be