make one's way deeper into or through; "The hikers did not manage to penetrate the dense forest"より深く、または、それを通してその人の道を作る這入り込む
例:The hikers did not manage to penetrate the dense forest. ハイカーたちは深い森を抜けることができなかった。
come to understand分かるようになる酌取る
pass into or through, often by overcoming resistance; "The bullet penetrated her chest"抵抗を克服してつき通す通貫
enter a group or organization in order to spy on the members; "The student organization was infiltrated by a traitor"メンバーを見張るためにそのグループ、または組織に入り込む浸透
spread or diffuse through; "An atmosphere of distrust has permeated this administration"; "music penetrated the entire building"; "His campaign was riddled with accusations and personal attacks"普及する、または拡散する遍満