hardtacklike
hardtacklike is a term used to describe something that resembles or has the characteristics of hardtack. Hardtack itself is a hard, dry biscuit made from flour, water, and sometimes salt, historically used as a long-lasting food source, especially by sailors and soldiers. Its defining features are its extreme dryness and hardness, which contribute to its exceptionally long shelf life.
Therefore, something described as hardtacklike would likely be very dry, dense, and difficult to chew or break.