Also means
to connect (roads, places)
Usage Note
Comunicar is used for transmitting information (comunicar una noticia) and, reflexively, for being linked (las dos ciudades se comunican por tren). The reflexive comunicarse specifically means to get in touch with someone. Do not confuse it with informar, which is more formal and one-directional.
Examples
"Es difícil comunicar ideas complejas."
Natural Translation
It is difficult to communicate complex ideas.

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