3. suōs, used as a noun, his men.
4. We say build a bridge over; the Romans, make a bridge on.
5. Place first.
[ Fifth Review, Lessons XXXVII-XLIV, §§ 517-520]
[ LESSON XLV]
ADJECTIVES OF THE THIRD DECLENSION · I-STEMS
[250.] Adjectives are either of the first and second declensions (like bonus, aeger, or līber), or they are of the third declension.
[251.] Nearly all adjectives of the third declension have i-stems, and they are declined almost like nouns with i-stems.