Used before a verb to indicate that an action or situation occurs suddenly or unexpectedly.

to dote on; to spoil; to bestow favor on; to indulge

temperament; disposition; temper (as in 性急 xìng​jí, 任性 rèn​xìng)

A suffix attached to a word to form a retroflex ending, often indicating a small size, a sense of familiarity, or turning a word into a noun.