truancy
noun
[ ˈtruːənsi ]
• the action of staying away from school without good reason; absenteeism.
• "fines to tackle truancy"
Similar:
absenteeism,
non-attendance,
absence,
playing truant,
truanting,
skiving,
bunking off,
wagging,
playing hooky,
goofing off,
ditching,
playing the wag,