toehold
noun [ C ] uk/ˈtəʊ.həʊld/ us/ˈtoʊ.hoʊld/
(IN ROCK)
（攀岩时仅可放下足尖的）小立足点，小支撑点
a small hole or surface on a rock that is just big enough for a climber to put the end of his or her foot in or on
I searched desperately for a toehold in the rock face. 我努力在岩石表面寻找立足点。
(STRONG FIRST POSITION)
（进一步发展的）立足点
a strong first position from which further progress can be made
Insurance is a very difficult market to get a toehold in. 在保险市场中立足很难。