We found one dictionary that defines the word undercommunication:

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1. undercommunication: Wiktionary

Definitions from Wiktionary (undercommunication) ▸ noun:  Too little communication. ▸ Words similar to undercommunication ▸ Usage examples for undercommunication ▸ Idioms related to undercommunication ▸ Wikipedia articles (New!) ▸ Popular adjectives describing undercommunication ▸ Words that often appear near undercommunication ▸ Rhymes of undercommunication ▸ Invented words related to undercommunication