used after a negative word (such as not or a contraction of not) to stress the smallness of an amount or effort甚至（用在否定词后，强调数量之少或事情之小）
We didn’t hear so much as a word from her the whole time. [=we didn’t hear a word from her]
Not only did they not help, they didn’t so much as [=even] offer to help!
They ended their date without so much as a hug.
with negative even甚至：
he sat down without so much as a word to anyone.他坐下来甚至没和任何人说一个字。