v.check; examine; inspect
He was found to have work problems.
The investigation reveals no evidence.
Has the account book been checked through?
interrogate and examine
v.consult; look up; refer to
Why don't you look it up in the encyclopedia?
I don't even know how to get to Berlin without consulting a map.
You should look up words you don't understand in the dictionary.
look up a word in a dictionary
v.investigate; probe; survey; look into
Have you looked into his experiences?
The public require that the cause of the fire be found out.
A team of experts has been called to look into the case.