noun, used as a suffix, noun
mixed with; interspersed with; dashed with
Used as a suffix or noun to indicate that something contains a mixture or admixture of another element, often in a physical or figurative sense.
白髪交じりの髪をしている。
He has hair mixed with gray.
彼の話には冗談交じりの本音が感じられた。
In his story, I sensed his true feelings mixed with jokes.
Derived from the verb 交じる (まじる, 'to mix, to be mixed'), with the nominalizing suffix り. The kanji 交 suggests crossing or mingling, while 混 emphasizes blending.