The antonyms for the word "most puttylike" would be words that describe something that is not soft, moldable, or easily manipulated. Some possible antonyms could include words such as inflexible, rigid, firm, hard, or solid. These words describe things that are not easily changed or reshaped, either physically or metaphorically. For instance, a concrete wall is hard and inflexible, whereas putty is soft and pliable. In general, the antonyms for "most puttylike" would be words that suggest hardness, strength, durability, or permanence, rather than softness or malleability.