conquīrō for con-quaerō.

e) au becomes ū, sometimes ō; as,--

conclūdō for con-claudō;
explōdō for ex-plaudō.

2. Contraction. Concurrent vowels were frequently contracted into one long
vowel. The first of the two vowels regularly prevailed; as,--

trēs for tre-es; cōpia for co-opia;
mālō for ma(v)elō; cōgō for co-agō;
amāstī for amā(v)istī; cōmō for co-emō;
dēbeō for dē(h)abeō; jūnior for ju(v)enior.
nīl for nihil;

3. Parasitic Vowels. In the environment of liquids and nasals a parasitic
vowel sometimes develops; as,--

vinculum for earlier vinclum.

So perīculum, saeculum.

4. Syncope. Sometimes a vowel drops out by syncope; as,--

ārdor for āridor (compare _āridus_);
valdē for validē (compare _validus_).

CONSONANT CHANGES[10]