O

o,

the vowel, pronunciation of, , 38-41, 43-45;

final, quantity of, 2437, 2442, 2443.

o and ō, weakening of, , , c, , ;

in contraction, 118, 3;

combination into diphthongs, ;

analogical lengthening, ;

iambic shortening, , ;

qualitative changes of, , , ;

qualitative gradation, .

ō,

with nom. of exclamation, 1117;

with voc. nom. and voc., 1123;

with acc., 1149;

ō utinam, ō sī, with wishes, 1541, 1546.

ob,

prep., 1410;

form of, 164, 2;

compounds of, with acc., 1137;

compounds of, with dat., 1188, 1189, 1194;

compounds of, other constructions with, 1190, 1191, 1196;

expressing cause, &c., 1317;

with gerundive construction or gerund, 2253.

obcumbō,

prin. parts of, .

obeō,

construction with, 1191.

ōbice,

decl. of, ;

gender of, .

oblīvīscor,

prin. parts of, ;

cases with, 1287, 1288.

obmutēscō,

prin. parts of, .

obsideō,

prin. parts of, .

obsisto,

with nē, 1960, 1977;

with quōminus, 1960, 1977.

obsolēscō,

prin. parts of, .

obstō,

with nē, 1960, 1977;

with quōminus, 1960, 1977.

obsurdēscō,

prin. parts of, .

obtundō (op-), forms of, .

obviam,

verbs combined with, followed by dat., 1187.

occalēscō,

prin. parts of, .

occidō,

prin. parts of, .

occinō,

perf. of, ;

forms of, .

occulō,

prin. parts of, .

ōcior,

comparison of, .

ōcius,

comparison of, .

octō,

with shortened final o, 2442.

ōdī,

defective, ;

synopsis of, ;

forms ōsus sum, fuī, ;

no pass., ;

form ōsus, ;

form ōsūrus, ;

meaning of, 1607.

oe,

diphthong, pronunciation of, , ;

changes of, .

officiō,

with nē, 1960;

with quōminus, 1960.

ŏ̄hē,

quantity of o in, 127, 8;

quantity of ē in, 2440.

oi,

diphthong, pronunciation of, , ;

changes of, .

oleaster,

gender of, .

oleō,

prin. parts of, 1006.

olus,

ollus, olle, , .

omitte,

with infin., for nōlī, 1584.

omnīnō,

use of, 2150.

omnis,

gen. in appos. with possess. pron., 1235;

omnium with gen. of pron., 1234;

used partitively, 1244;

with loc. abl., 1346;

first syllable of, shortened, 2469.

onustus,

with gen., 1387;

with abl., 1387.

opera,

use of abl. of, 1378.

operiō,

prin. parts of, 1019.

opīniōne,

with compar., 1330.

opis,

decl. of, , .

oportet,

forms of, ;

implying non-occurrent action, 1496;

coordinated, 1709;

with subj. infin., 2209;

in past tense with pres. infin., translation of, 2222;

with perf. pass. and act. infin., 2230.

opperior,

prin. parts of, 1020.

oppidum,

pred. in agreement with, 1072;

acc. of, with in or ad, 1159;

oppidō and in oppidō, 1333;

oppidū̆m, .

oppingō,

prin. parts of, ;

perf. of, .

oppūgnō,

construction with, 1191.

Ops,

decl. of, .

opstipēscō (ob-), prin. parts of, .

optābile est,

implying non-occurrent action, 1496.

optābilius est,

implying non-occurrent action, 1496.

optimē,

comparison of, .

optimus,

form of, , ;

formation of, ;

comparison of, ;

optimum est implying non-occurrent action, 1496;

optumum est coordinated, 1709.

optō,

coordination of forms of, 1707;

with ut, 1950;

with acc. and infin., 2190.

opus est,

with abl., 1379;

with partic., 1382;

with subj. nom. or acc., 1383;

with gen., 1383;

coordinated, 1709;

with supine in -ū, 2276;

with subst. and partic., 2286.

orbis,

gender of, ;

loc. orbī, 1337.

orbō,

constructions with, 1303, 1304.

ōrdior,

prin. parts of, 1022.

ōrdō,

gender of, .

orior,

forms of, , ;

gerundive of, ;

prin. parts of, ;

ortus and oriundus with abl., 1312;

ortus used actively, 1364.

ōrō,

coordinated, 1708;

with ut, 1950;

with acc. and infin., 2194.

os,

decl. of, ;

gender of, ;

plur. ossua, ;

quantity, 2433.

ōs,

decl. of, , ;

gender of, .

ostendō,

forms of, .

ou,

diphthong, pronunciation of, , ;

changes of, .