to hear: to take in what reaches the ear, and from there to listen, understand, heed, and answer.
At its root this is the plain act of hearing, sound reaching the ear. But in this word hearing is rarely just a fact about the ear. The same verb slides naturally from catching a sound, to paying attention, to grasping what is said, to doing it. That whole range lives in one word, and the context, not a different word, tells you how far along that path a given verse has traveled.
The signature move is the last step: to hear can mean "to obey." To hear a parent, a king, or God is to comply, and a refusal is described not as a hearing problem but as a refusal to hear. This is why Israel's central confession opens with this word ("Hear, O Israel"): it summons not merely to listen but to heed and live by what follows. The same logic runs the other way when God is the one who hears. For God to hear a cry or a prayer is to act on it, to answer, which is why the prophets can charge that God will not hear a guilty people: the silence is judgment, not deafness.
The word also reaches in two further directions that belong to the same core. When something is caused to be heard, it is announced or proclaimed, the report sent out so others take it in. And in a courtroom or council, to hear a case is to give it a fair hearing and decide it.
These are shades of one idea, not separate words, and the move from hearing to obeying is not a quirk of the Hebrew mind: the very same range belongs to the ordinary words for hearing in Akkadian, Aramaic, Arabic, and others, and even to the Greek and Latin words that gave English the word "obey." The thread that holds it together is a person taking in what reaches them and responding, whether the response is understanding, obedience, an answer, or a verdict.
Nuances
Disputed
The lexica split over whether "obey" is a distinct sense of the word or simply "listen to" carried to its natural end. BDB and NIDOTTE list "obey" as its own numbered sense; HALOT and Schult's article treat it as a contextual extension of "listen to," charting hear then listen to then comply then obey rather than a separate meaning. The disagreement is about how to map one agreed range, not about what the word does.
- contested"obey" is a discrete sense, listed alongside hear, perceive, and understand.; BDB (Brown-Driver-Briggs), s.v. שׁמע, pp. 1033-1035; T. Kleven (attrib.), "שׁמע," in New International Dictionary of Old Testament Theology and Exegesis (NIDOTTE) 4 (1997)
- contested"obey" is not a separate sense but "listen to" extended by context, generated by the constructions that mark the object.; HALOT (Koehler-Baumgartner), s.v. שׁמע; H. Schult, "שׁמע," in Theologisches Handworterbuch zum Alten Testament (THAT) II (1976), cols. 974-982 = TLOT 3