Sentence:  Interpretation , naturally , remains the role of the therapist , but orientation - not only the patient 's vocal giveaways of geographical and socio-economic background , but also vocal but non-verbal giveaways of danger spots in his relationship to people - can be considerably <WSD>beefed</WSD> up by the linguist . 
Meaning of the word marked with <WSD> tags:  make strong or stronger