อม

[to] hold in the mouth; suck

to keep something in the mouth without swallowing, often sucking it (e.g., candy, lozenge, cough drop)

[to] embezzle; pocket (fig.)

to secretly take or keep money or benefits for oneself; to pocket funds (informal figurative use)

[to] hold back words; keep silent (fig.)

to refrain from speaking or revealing information, as if holding words in the mouth (figurative)