The article examines the role of doubled roots in the creation of sound symbolism in the language of the Quran. A quantitative analysis of all cases of the occurrence of word forms derived from doubled roots in the text of the Quran showed that the sound-symbolic meaning is not specific for double roots: ideophones constitute only a small part of the vocabulary formed from this type of roots. This contrasts with the results of previous research, also based on the material of the Quranic language, which revealed the specific sound-symbolic meaning of the four-consonant roots formed by the reduplication of a two-consonant cell. The data obtained do not allow us to conclude that any reduplication or germination in the structure of the Arabic root is a characteristic marker of sound-symbolic vocabulary. Nevertheless, the contextual analysis of lexemes formed from doubled roots made it possible to identify their important role in creating sound symbolism in specific suras and ayahs of the Quran, which is one of the factors of rhetorical perfection and the emotional and psychological power of the Quranic text on its listeners.