A useless or junk item
Encoding Strategies:
mnemonic

trash
useless item
+
-o
noun suffix
Trasto means piece of junk and sounds like the English word trash0 turned into a noun1.
trasto
piece of junk, useless object
A useless object that clutters a space.
El garaje está lleno de trastos viejosThe garage is full of old junk
Tira ese trasto, nadie lo usaThrow that piece of junk away, nobody uses it
rascal, little troublemaker (affectionate)
A piece of junk is something you don't know what to do with. When used affectionately for a child, it's like saying, "What am I going to do with you?"
¡Ven aquí, trasto!Come here, you little rascal!
Este trasto no para de meterse en líosThis little troublemaker never stops getting into mischief
trastos
utensils, gear, stuff, things
The utensils or gear for a given activity — just the stuff or junk you need to do it.
Recogió los trastos de pescar y se fue al ríoHe picked up his fishing gear (his fishing junk / stuff) and headed to the river
Guarda los trastos de pintura cuando terminesPut away your painting things (your junk / stuff for painting) when you're done
Voy a fregar los trastos antes de acostarmeI'm going to do the dishes before going to bed (wash all the junk in the sink, the dirty miscellaneous kitchenware)