"Let grow" is a phrase that imparts the idea of allowing something to develop or prosper. Synonyms for "let grow" include "encourage", which implies providing support and motivation for growth; "nurture", suggesting the act of fostering and caring for the development of something; "cultivate", indicating the deliberate effort in fostering growth; "promote", emphasizing the active role in advancing progress; "foster", denoting the act of creating a conducive environment for growth; and "sustain", emphasizing the continuation and maintenance of growth. By understanding these synonyms, individuals can better comprehend the concept of "let grow" and the importance of facilitating positive development and expansion.