sound out -
speak, pronounce, or utter in a certain way; "She pronounces French words in a funny way"; "I cannot say `zip wire'"; "Can the child sound out this complicated word?"
retroflex articulate (a consonant) with the tongue curled back against the palate; "Indian accents can be characterized by the fact that speakers retroflex their consonants"
subvocalise,
subvocalize articulate without making audible sounds; "she was reading to herself and merely subvocalized"
syllabise,
syllabize utter with distinct articulation of each syllable; "The poet syllabized the verses he read"
drawl lengthen and slow down or draw out; "drawl one's vowels"