scrīpsī (scrīb-sī), scrīptum (scrīb-tum).

b) g before s or t becomes c; as,--

āctus (āg-tus).

c) m before a dental or guttural becomes n; as,--

eundem (eum-dem); prīnceps (prīm-ceps).

PECULIARITIES OF ORTHOGRAPHY.

9. Many words have variable orthography.

1. Sometimes the different forms belong to different periods of the
language. Thus, quom, voltus, volnus, volt, etc., were the prevailing forms
almost down to the Augustan age; after that, cum, vultus, vulnus, vult,
etc. So optumus, maxumus, lubet, lubīdō, etc. down to about the same era;
later, optimus, maximus, libet, libīdō, etc.

2. In some words the orthography varies at one and the same period of the
language. Examples are exspectō, expectō; exsistō, existō; epistula,
epistola; adulēscēns, adolēscēns; paulus, paullus; cottīdiē, cotīdiē; and,
particularly, prepositional compounds, which often made a concession to the
etymology in the spelling; as,--

ad-gerō or aggerō; ad-serō or asserō;
ad-liciō or alliciō; in-lātus or illātus;
ad-rogāns or arrogāns; sub-moveō or summoveō;