sēmentī, -e, planting
strigilī, -e, skin-scraper
turrī, -e, tower
[556]. A few other words in -is have occasionally an ablative in -ī: as, anguis, snake, collis, hill, fīnis, end, postis, post, unguis, nail, &c. sors, lot, imber, shower, and lūx, light, have also -e or -ī; supellēx, furniture, has supellēctilī or -e; Arar has -e or -ī; Liger, -ī or -e.
[557]. Neuter names of towns with the nominative in -e have -e in the ablative: as, Praeneste. rēte, net, has only rēte; mare, sea, has rarely mare ([527]).
[558]. (2.) Adjectives ‘of two endings’ with stems in -i- ([630]) often have -e in the ablative when they are used as substantives, and sometimes in verse, when a short vowel is needed: as,
adfīnī, -e, connection by marriage; aedīle, -ī, aedile; familiārī, -e, friend. But some, even as substantives, have -ī: as, aequālī, of the same age, cōnsulārī, ex-consul, gentīlī, tribesman. Adjectives of place in -ēnsis ([330]) usually have -ī, but sometimes -e: as, Tarquiniēnse. Proper names have usually -e: as, Iuvenāle.
[559]. Adjectives ‘of one ending’ with stems in -i- ([632]), have commonly -ī in the ablative. The following ablatives have only -ī:
āmentī, frenzied, ancipitī, two-headed, praecipitī, head-first, concolōrī, of like hue, concordī, harmonious, discordī, at variance, sōcordī, imperceptive, dēgenerī, degenerate, dītī, rich, teretī, rounded, ingentī, huge, inopī, without means, memorī, remembering, immemorī, forgetful.
[560]. Present participles, when used as adjectives, have -ī in the ablative, otherwise -e: as,