An Etymological Dictionary of Astronomy and Astrophysics

1a) Application of the mind to the acquisition of knowledge, as by reading, investigation, or reflection.

1b) The cultivation of a particular branch of learning, science, or art.

1c) Something studied or to be studied.

1d) Research or a detailed examination and analysis of a subject, phenomenon, etc. A written account of such research, examination, or analysis.

2a) To apply oneself to the acquisition of knowledge, as by reading, investigation, or practice.

2b) To think deeply, reflect, or consider.

2c) To take a course of study, as at a college (Dictionary.com).

Etymology (EN): M.E. studie, from O.Fr. estudie “care, skill, thought; study, school,” from L. studium “study, application;” originally “eagerness,” from studere “to press forward, be eager for, pursue,” from PIE *(s)teu- “to push, stick, beat;” cf. Gk. typtein “to strike,” typos “a blow, mold;” Skt. tup- “harm,” tundate “pushes, stabs;” Gothic stautan “push.”

Etymology (PE): Parhâné, from Proto-Ir. *pari-huan- “to read thoroughly, to read through,” from *pari- “through, throughout; thoroughly” (O.Pers. pariy “around, about;” Av. pairi “around, over”)

• *huanH- “to call;” cf. Pers. xândan, x^vandan “to read, to sing” (Av. x^van- “to sound;”
  Skt. svana- “sound,” svan- “to sound,” svanati “it sounds;” O.E. swinn “music, song”); cf. Kurd. xwendin “to study, read;” Lori hané “to read;” Karingâni hoyniyan, Baluci vonag, Awromâni wânây “to read;” Khotanese hâvn- “to speak.”