针 zhēn needle

needle; injection

怎么记住“针”: 钅 gold + 十 ten = needle. Grandma threads a gold yarn and sews ten tiny stars onto the wedding dress with her finest needle.

部件结构

形声 · Meaning + sound

One part gives the meaning, the other gives the sound.

针 = 钅 gold + 十 ten

Gushi 故事

Grandma threads a gold yarn and sews ten tiny stars onto the wedding dress with her finest needle.

Metal gives the meaning and the sign for ten the sound.

'Needle, pin', sewing needles, and medical injections: 打针 (dǎzhēn) get a shot/injection.
针对 (zhēnduì) = to be aimed/directed at, targeting: 针对这个问题 (zhēnduì zhège wèntí) with respect to this problem.
方针 (fāngzhēn) = policy/guiding principle; 一针见血 (yìzhēn-jiànxiě) = to hit the nail on the head (draw blood with one prick).