Amai (甘い) is a Japanese i-adjective that means 'sweet' in English. It is used to describe a sweet taste, such as in fruits, desserts, or drinks. It can also be used metaphorically to mean 'naive', 'indulgent', or 'sugary' .
In bonsai, amai is a term that refers to the amount of sprinkling water. It means that the water is 'sweet' or 'gentle', meaning that it is not too strong or too much for the bonsai tree. Amai water is suitable for delicate or young bonsai trees that need careful watering.