KanjiJLPT N1
Darning

darning, repair, mend, trim, tidy up, adjust

Mnemonic

Your grandma is the most virtuous person you know—she never throws anything away. Every torn sock and frayed sweater gets saved. Each night she sits by lamplight, Darning them back to perfection. Grandma's virtuous habit means nothing is ever discarded, only lovingly mended.
Additional thoughts
Picture grandma in her rocking chair, needle and thread in hand, a mountain of worn socks beside her. Her virtue is thrift—repairing rather than replacing. The warm lamplight and rhythmic stitching lock the image in.
Quick recall
Grandma is so virtuous she spends every evening darning the family's worn clothes instead of throwing them away.

Details

The keyword for 繕 is darning. This kanji refers to the act of mending or repairing things, particularly clothing or fabric, by stitching over worn or damaged areas. It extends beyond just sewing to encompass the broader idea of patching up, fixing, or restoring something to a presentable condition. The character can also carry the nuance of tidying up appearances or making superficial repairs to cover up flaws.
On'yomi
ぜん
Kun'yomi
つくろ.う

Used in vocab