tinker

nouns

a person who enjoys fixing and experimenting with machines and their parts
formerly a person (traditionally a Gypsy) who traveled from place to place mending pots and kettles and other metal utensils as a way to earn a living
is a type of (narrower)
a laborer who moves from place to place as demanded by employment
"itinerant traders"
small mackerel found nearly worldwide

verbs

do random, unplanned work or activities or spend time idly
"The old lady is usually mucking about in her little house"
is derived from
is derived from
work as a tinker or tinkerer
is a type of (narrower)
be employed
"Is your husband working again?"; "My wife never worked"; "Do you want to work after the age of 60?"; "She never did any work because she inherited a lot of money"; "She works as a waitress to put herself through college"
try to fix or mend
"Can you tinker with the T.V. set--it's not working right"; "She always fiddles with her van on the weekend"