There are a variety of synonyms for the word "waif-like," each conveying a slightly different meaning. Some options include delicate, frail, ethereal, skinny, skinny-dipping, emaciated, bony, undernourished, lanky, and slim. These terms all suggest a thin, delicate appearance, often with a hint of vulnerability or fragility. While "waif-like" may suggest a more whimsical, fairy-like quality, other synonyms like "emaciated" or "undernourished" may carry a more negative connotation related to poor health or malnourishment. Ultimately, the most appropriate synonym for "waif-like" will depend on the context and tone of the sentence in which it appears.