hazardous

definition: 
involving risk or danger
sentence: 
At sea, leaving your stuff all over the place can be hazardous if the sub has to make an emergency dive or surface unexpectedly.
difficulty: 
easy
toefl frequency: 
2
toefl classification: 
adverb: 
hazardously
adjective: 
hazardous
adverb sentence: 
adjective sentence: 
verb: 
verb sentence: 
noun: 
hazard
noun sentence: 
There are many hazards involved with starting a business.