This is the 9980th most frequent Japanese word.
踏み入れる
To step into; to enter.
Here, '踏み入れる' means to 'step into' or 'enter,' emphasizing the act of entering an unknown or previously unexplored area.
彼はついに未開の地域に踏み入れた。
He finally set foot into the unexplored region.
In this sentence, '踏み入れる' is used to indicate entering a place without proper authorization.
学校の敷地に無断で踏み入れることは禁じられています。
Entering the school grounds without permission is prohibited.
Here, '踏み入れる' metaphorically means to get involved or enter into someone's emotional or inner world.