mechón
lock
mecha
wick
+
-ón
augmentative suffix
Mechón means lock (of hair) and can be thought of as a larger version (-ón1) of a mecha0 (wick0), like a thick strand of hair.
noun
- lockA small bunch or lock of hairUn mechón de pelo cayó sobre su frente. // A lock of hair fell over his forehead.