What is the meaning of こん?

: thing

:

: one of the five classical elements in traditional Chinese philosophy and medicine: see the "Wu Xing" entry on Wikipedia

: perseverance, patience; (arithmetic) root

: navy blue, dark blue

: fish

:

: soul

: (Chinese mythology) a giant fish

: this

: a surname

: Gun (Chinese)

Short for こんにちは.

Short for こんばんは.

Source: wiktionary.org