Chink
/tʃɪŋk/
noun
A narrow opening such as a fissure or crack.
A chip or dent in something metallic.
“The warrior saw a chink in her enemy's armor, and aimed her spear accordingly.”
A vulnerability or flaw in a protection system or in any otherwise formidable system.
“The chink in the theory is that the invaders have superior muskets.”
verb
To fill an opening such as the space between logs in a log house with chinking; to caulk.
“to chink a wall”
To crack; to open.
To cause to open in cracks or fissures.