The phrase "shook down" means to forcefully extort money or valuables from someone. Antonyms for this phrase can include "gave freely," "donated willingly," or "showed generosity." These terms imply a willingness to share without coercion or pressure. Other antonyms could be a negotiation or agreement. "Collaborated" or "compromised" suggests that both parties come to a mutual agreement rather than one party dictating terms. Overall, antonyms of "shook down" generally imply positive actions rather than forceful or negative actions. These terms portray a sense of generosity, collaboration, and respect for others' autonomy.