Appropinquate is a rarely used word that means to approach or come close to something or someone. If you're looking for a more common synonym, you could try using words like "near," "close," "approach," or "advance." Other synonyms for appropinquate might include "draw near," "edge closer," "approach slowly," "narrow the distance," or "move closer to your objective." Depending on the context of the sentence, there may be a variety of words or phrases that could be used instead of appropinquate. So, if you're struggling to find the right synonym for this particular word, don't worry - there are likely plenty of options available to choose from.