Delinquent is spelled as above and in this answer. It means an offender or someone who has defaulted or is guilty of an offence. It originates from the Latin 'delinquens' which means to offend.
For some reason it was very often used in association with younger people, in which case the term used was 'juvenile delinquent' which means young offender. However, it has dropped out of fashion somewhat and the more commonly used term currently is young offender.
For some reason it was very often used in association with younger people, in which case the term used was 'juvenile delinquent' which means young offender. However, it has dropped out of fashion somewhat and the more commonly used term currently is young offender.