TSUMUGU · TOCFL 1 (est.) · 字
練
練 ＝ 糸 ＋ 柬
ㄌㄧㄢˋ · liàn
verb — to practice, drill; adj — skilled, seasoned
字源 FORM — what the parts do
糸義silk thread
柬聲jiǎn — gives the soundthe same 柬 under 揀、煉
{j,l}Ijiǎn → liàn — the palatal shifts to l in this branch
Raw silk (糸) boiled soft over and over until it runs smooth — that repeated working is 練. 柬 carries the sound, jiǎn worn to liàn. The soaking became any drilling done again and again: 練習、訓練、熟練.
故事 STORY — a scene to remember it by
一束生絲（糸）反覆下水煮、撈起，越練越柔。
A skein of raw silk (糸) goes back into the pot again and again, softer each time.
字源記憶法
意 · Meanings
(本義)湅絲、漂練— to boil and soften raw silk
→練習、訓練— to practice, drill常用
⇒熟練、老練— skilled, seasoned常用
(本義) original meaning · → ⇒ each arrow = one more step of extension
關 · Related
煉liànthe lookalike — 煉 refines with fire 火, 練 softens with thread-work ; both read liàn on 線＝ ＋ 泉xiànthread-radical cousin — 線 is the thread itself, 練 the working of it