吟
ギン

versify, singing, recital

JLPT1 G7 S7 F1956

As per 今# (contain) + 口 mouth → indistinct sound contained within the mouth (compare 音) → *groan*; *moan*; *hum*; *sing*; *recite* → *poem*. 吟 and 含 are an example of a pair of characters devised from the same elements but expressing different meanings; for another example, see 忙 and 忘.

[Full Kanji Etymology List]