vt.先发制人,预先阻止,垄断,屯积,领先
To forestall is better than to amend.
与其补救于已然,不如防范于未然.
Try to forestall their questions.
尽量不让他们问问题(作到先发制人).
Try to anticipate what your child will do and forestall problems.
尽量预见你的孩子会干什么,并预先阻止问题发生。