insurmountable /ˌɪnsɚˈmaʊntəbəl/ adjective /ˌɪnsɚˈmaʊntəbəl/
adjective
Learner's definition of INSURMOUNTABLE
[more insurmountable; most insurmountable] of a problem, difficulty, etc.
: impossible to solve or get control of : impossible to overcome难以克服的;难以解决的;难以处理的 — insurmountably
/ˌɪnsɚˈmaʊntəbli/ adverb