hi, i think the correct pinying should be "tian tian de"甜甜的 it can be translated as "sweet" and its an adjective. 1.there is a sweet smile on her face. 2.this sugar is sweet.

Hello Brindle, 甜甜的 tian2tian2de means literally sweet sweet and 'de' is used for description of a following noun.

tiantiande= tian tian de 1 甜甜的，sweet(taste), or means nice ,lovely,cute...whatever ,such as sweet smile,sweet voice.... 2 天天的，every day

sweet

besides Claire's two explanations, tian tian de ALSO describe a girl,the same meaning of a "sweet girl". But some times it also can describe a little boy.