奥 , おく
1. inner part , interior , back (of a drawer, one's throat, etc.) , depths (e.g. of a forest) , recesses (e.g. of a cave) , heart , end (of a road, garden, etc.)
2. living quarters (at the back of a house) , inner room
3. recesses (of one's mind) , bottom (of one's heart) , behind (someone's words) , mysteries (of an art)
彼は建物の奥に行ってみました。
に
Particle
1. at (place, time) , in , on , during
2. to (direction, state) , toward , into
3. for (purpose)
4. because of (reason) , for , with
5. by , from
ある , 有る , 在る
Godan verb , Intransitive , See 居る・いる・1 , usu. of inanimate objects
1. to be , to exist , to live
2. to have
3. to be located
4. to be equipped with
5. to happen , to come about
悪いけどほかに用事があるの。
ある , 或る , 或
Pre-noun adjectival (rentaishi)
a certain ... , some ...
ある学生に会うところです。
の , 乃
Particle , orig. written 乃 or 之
1. indicates possessive
2. nominalizes verbs and adjectives
See が・1
3. substitutes for "ga" in subordinate phrases
at sentence-end; falling tone
4. indicates a confident conclusion
Female term or language , at sentence-end
5. indicates emotional emphasis
は
Particle , pronounced わ in modern Japanese
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis