1) Think deeply about the word and its connotations in orthodox society. For instance Dog and Mut have similar if not exactly the same meanings. The problem is mut is usually used pejoratively and has a negative connotation whilst dog has more of a neutral feeling about it.
For words such as love you may have to think more deeply than for other words. Don't be afraid to spend multiple days contemplating the complexity of the definition of a word. For instance If i were to think long and hard about the meaning of the word love I would say that love is the state of mind in which you care for someone more than you would care for yourself.
2) Don't be afraid to consult a teacher, parent, dictionary, or google.
3)If all else fails ask a professional.
step 1) works particularly well for made up words such as douchebagular.