身み軽がる

身み軽がるに〈動どう詞し〉to do something nimbly/lightly
猫ねこは身み軽がるに塀へいを飛とび越こえた。
The cat leapt over the fence nimbly.
身み軽がるな服ふく装そうlight, easy-to-move-in clothing
旅りょ行こうには身み軽がるな服ふく装そうが便べん利りだ。
Light, unencumbered clothing is convenient for travel.
身み軽がるになるto become free of responsibilities or burdens
子こ供どもが独どく立りつして身み軽がるになった。
Now that the kids are independent, I've become free of a lot of responsibility.
身み軽がるで旅りょ行こうするto travel light, with little luggage
彼かの女じょはいつも身み軽がるで旅りょ行こうする。
She always travels light, with minimal luggage.

Kanji

軽けい快かいN1sense 1
軽快 describes brisk, light movement or rhythm (often of music or walking), while 身軽 focuses on a person's or animal's unencumbered, agile state.
軽けい装そう sense 2
軽装 specifically means light clothing or equipment for travel, while 身軽 more broadly covers having little luggage or being physically unencumbered.
気き軽がるN2sense 3
気軽 means doing something readily and without hesitation in a social sense, while 身軽 describes being free of physical or situational burdens.
敏びん捷しょう sense 1
敏捷 is a more formal, almost technical word for quickness of movement, whereas 身軽 is the everyday word for being nimble or unencumbered.

手て軽がるN2
身軽 describes a person's body or movements as light and agile, while 手軽 describes an action or thing as easy and hassle-free; the two share the kanji 軽 but differ in meaning.

Compound of 身 (body, oneself) and 軽 (light). The reading みがる is a standard kun'yomi combination.