Her instructions were so ambiguous that the team was confused about the next steps.

ambiguous 是形容词，由前缀 ambi-（表示"两者"）和词根 ag（表示"做、行动"）加上形容词后缀 -ous 组成，字面意思是"可以做两种理解的"，即"模棱两可的、不明确的"。