Idiom
He was undecided. He let the grass grow under his feet.

stayed out
sat unmoving
moved away
loitered around

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Idiom
Will o' the wisp

Anything which eludes or deceives
To act in a foolish way
To act in a childish way
To have desires unbacked by efforts

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Idiom
Swan-song

Last work of a poet or musician before death
A melodious song in praise of someone
Music as sweet as a song of birds
Praise of a woman by her lover

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