物心(ものごころ)awareness of things around one, ability to understand what is going on around oneself, judgment, judgement, discretion

物心(ものごころ)がつき始(はじ)めたのは５歳(ごさい)ごろです。

I began to develop awareness of things around me at around the age of five.

赤(あか)ちゃんには、まだ物心(ものごころ)のようなものはない。

A baby does not yet have the awareness of things around one.

世(よ)の中(なか)の道理(どうり)や人情(にんじょう)を理解(りかい)する心(こころ)の事(こと)を物心(ものごころ)と言(い)います。

The ability to understand the ways of the world and human emotions is called awareness of things around one.

倫理観(りんりかん)などの基本(きほん)は物心(ものごころ)がつく時(とき)に形成(けいせい)されると聞(き)いたことがある。

I have heard that the basics of ethics and such are formed when one develops an awareness of things around oneself.

物心(ものごころ)がつく前(まえ)からピアノをやっていたとあって、私(わたし)には絶対音感(ぜったいおんかん)があります。

Since I had been playing the piano from before I developed awareness of things around one, I have absolute pitch.