Refers to smooth exchange of ideas, feelings, or information between people. Often used in phrases like 意思疎通 (mutual understanding) or 疎通を図る (try to establish communication).
Even with a language barrier, some degree of mutual understanding is possible.
2
noun, noun or participle which takes 'suru', intransitive verb
passing without obstruction
Rare, literal sense: something (e.g., water, traffic) flowing through smoothly. Mostly found in technical or older texts; the communication sense is far more common.
