Behave badly:
— The children misbehaved all morning.

synonyms: misconduct, misdemean.

Roget 851: be vulgar etc. adj.; misbehave; talk shop, smell of the shop.   

Roget 925: be undue etc. adj.; not be due etc. 924.    infringe, encroach, trench on, exact; arrogate, arrogate to oneself; give an inch and take an ell; stretch a point, strain a point; usurp, violate, do violence to.    disfranchise, disentitle, disqualify; invalidate.    relax etc. (be lax) 738; misbehave etc. (vice) 945; misbecome^†.    ... show more

Roget 945: be vicious etc. adj.; sin, commit sin, do amiss, err, transgress; misdemean oneself^†, forget oneself, misconduct oneself; misdo^†, misbehave; fall, lapse, slip, trip, offend, trespass; deviate from the line of duty, deviate from the path of virtue etc. 944; take a wrong course, go astray; hug a sin, hug a fault; sow one's wild oats.    render vicious etc. adj.; demoralize, brutalize; corrupt etc. (degrade) 659.    ... show more

Dutch: beesten, misdragen, zich misdragen