Curtail me thrice, I am a youth;
Behead me once, a snake;
Complete, I'm often used, in truth.
When certain steps you'd take.
Who or what am I?
Source: Gurgaon Times
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ladder
"Curtail me thrice, I am a youth;"
lad
"behead me once, a snake;"
"complete, I’m often used, in truth, when certain steps you’d take."
ladder
Source: Google