An onomatopoeic/mimetic word meaning delicately, weakly, or limply; soft and yielding movements (often slightly pejorative).
彼はなよなよと歩いていて、頼りなく見えた。
He walked weakly and looked unreliable.
なよなよした茎は風で簡単に折れる。
The limp stems break easily in the wind.
なよなよと声を震わせながら答えた。
He answered with a trembling, weak voice.