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penetrate (เพน'นิเทรท)

ก. ผ่านทะลุ, แทรกซึม, แผ่, V. Go into or through

ขยายอิทธิพล (something), especially
with force or effort

Some of his friends made a strenuous effort to penetrate the

barrier he was erecting and found that underneath was still the
friendly, deep thinking, brilliant mathematician.

https://en.oxforddictionaries.com/definition/penetrate