O
o,
the vowel, pronunciation of, 33, 38-41, 43-45;
final, quantity of, 2437, 2442, 2443.
o and ō, weakening of, 105, 107, c, 452, 827;
in contraction, 118, 3;
combination into diphthongs, 120;
analogical lengthening, 123;
iambic shortening, 129, 130;
qualitative changes of, 140, 141, 143;
qualitative gradation, 145.
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, 974.
obeō,
construction with, 1191.
ōbice,
decl. of, 473;
gender of, 581.
oblīvīscor,
prin. parts of, 980;
cases with, 1287, 1288.
obmutēscō,
prin. parts of, 976.
obsideō,
prin. parts of, 997.
obsisto,
with nē, 1960, 1977;
with quōminus, 1960, 1977.
obsolēscō,
prin. parts of, 968.
obstō,
with nē, 1960, 1977;
with quōminus, 1960, 1977.
obsurdēscō,
prin. parts of, 976.
obtundō (op-), forms of, 931.
obviam,
verbs combined with, followed by dat., 1187.
occalēscō,
prin. parts of, 976.
occidō,
prin. parts of, 930.
occinō,
perf. of, 823;
forms of, 972.
occulō,
prin. parts of, 972.
ōcior,
comparison of, 357.
ōcius,
comparison of, 363.
octō,
with shortened final o, 2442.
ōdī,
defective, 812;
synopsis of, 812;
forms ōsus sum, fuī, 813;
no pass., 813;
form ōsus, 814;
form ōsūrus, 814;
meaning of, 1607.
oe,
diphthong, pronunciation of, 47, 49;
changes of, 99.
officiō,
with nē, 1960;
with quōminus, 1960.
ŏ̄hē,
quantity of o in, 127, 8;
quantity of ē in, 2440.
oi,
diphthong, pronunciation of, 49, 50;
changes of, 99.
oleaster,
gender of, 408.
oleō,
prin. parts of, 1006.
olus,
ollus, olle, 667, 668.
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, 430, 480.
oportet,
forms of, 816;
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, 463.
oppingō,
prin. parts of, 938;
perf. of, 863.
oppūgnō,
construction with, 1191.
Ops,
decl. of, 480.
opstipēscō (ob-), prin. parts of, 976.
optābile est,
implying non-occurrent action, 1496.
optābilius est,
implying non-occurrent action, 1496.
optimē,
comparison of, 363.
optimus,
form of, 28, 103;
formation of, 351;
comparison of, 355;
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, 579;
loc. orbī, 1337.
orbō,
constructions with, 1303, 1304.
ōrdior,
prin. parts of, 1022.
ōrdō,
gender of, 574.
orior,
forms of, 791, 799;
gerundive of, 899;
prin. parts of, 981;
ortus and oriundus with abl., 1312;
ortus used actively, 1364.
ōrō,
coordinated, 1708;
with ut, 1950;
with acc. and infin., 2194.
os,
decl. of, 492;
gender of, 576;
plur. ossua, 586;
quantity, 2433.
ōs,
decl. of, 430, 491;
gender of, 576.
ostendō,
forms of, 924.
ou,
diphthong, pronunciation of, 47, 50;
changes of, 100.