ぐにゃぐにゃflabby, limp, soft and pliable

赤(あか)ちゃんが体(からだ)をグニャグニャ動(うご)かしている。

The baby is moving its body in a soft and pliable manner. {flabby, limp, soft and pliable}

車(くるま)に衝突(しょうとつ)された鉄柱(てっちゅう)がグニャグニャになっています。

The lamppost that was hit by a car has become soft and pliable. {flabby, limp, soft and pliable}

グニャグニャとしただらしない姿勢(しせい)で働(はたら)いてはいけない。

You must not work with a flabby, sloppy posture. {flabby, limp, soft and pliable}

こんなにグニャグニャに曲(ま)がった針金(はりがね)を伸(の)ばすのは不可能(ふかのう)です。

It is impossible to straighten this wire that is so soft and pliable. {flabby, limp, soft and pliable}

グニャグニャに曲(ま)がった鉄骨(てっこつ)を見(み)て、原子(げんし)爆弾(ばくだん)の恐(おそ)ろしさを感(かん)じた。

Looking at the iron frames that had turned soft and pliable, I felt the terror of the atomic bomb. {flabby, limp, soft and pliable}