When it comes to expressing the idea that something is insufficient or inadequate, the phrase "too little" is commonly used. However, there are a variety of synonyms that can be employed to convey this same concept in different ways. For example, you might say that something is lacking, wanting, insufficient, or inadequate. Other options might include terms like meager, scarce, paltry, or insufficiently abundant. Ultimately, the choice of synonym will depend on the specific context and the tone that you are trying to convey. Regardless of the word or phrase you use, the important thing is to make sure your meaning is clear and effective.