Armamenta (always plural) are utensils for almost any purpose. It is difficult to say whether the word is formed on the verb stem armo, or is an extended form of the noun arma; the former is entirely possible, while the equivalence of meaning in the two nouns supports the latter supposition. At any rate the meaning is “equipment”, “that with which one is armed”: hic tormenta, armamenta, arma, omnis apparatus belli est, Liv. 26, 43; cum omnibus Gallicis navibus spes in velis armamentisque consisteret, B. G. 3, 14; armamenta vinearum, Plin. 17, 21, 35. The most frequent use is that seen in the second example, where it means the rigging of a ship, in this instance, however, excluding the sails.
Medicamentum (medicor) is a remedy, a means of healing or curing: Si eo medicamento sanus factus erit, Off. 3, 24; multis medicamentis propter dolorem artuum delibutus, Brut. 60.
Operimentum (operio) is a cover, or means of covering: nuces gemino protectae operimento, Plin. 15, 22, 24; detracto oculorum operimento, Plin, 8, 42, 64. That the meaning “covering” is general, may be seen by comparing the second example with N. D. 2, 52, 147: palpebrae, quae sunt tegumenta oculorum. In the latter instance the “covering” is the eyebrow, in the former, some external object, probably wearing apparel.
Suffimentum (suffio) is a means of fumigating: in iis sine illius suffimentis expiati sumus, Leg. 1, 14, 40; laurus sit suffimentum caedis hostium et purgatio, Plin. 15, 30, 40.
Tegumentum, like operimentum, gets its fundamental meaning of “covering” from its verb stem, (tego), but is capable of being applied to many objects, as will be shown in Chapter III: tegumenta corporum, vel texta, vel suta, N. D. 2, 60; scutis tegimenta detrudere non tempus erat, B. G. 2, 21.
4. Nouns denoting instrument, with both general and figurative application.
Alimentum (alo) signifies a means of support or nourishment: nec desiderabat alimenta corporis, Timaeus, 6; addidit alimenta rumoribus, Liv. 35, 23.
Instrumentum (instruo) is a very general word meaning implement, furniture, supplies: arma, tela, equos et cetera instrumenta militiae parare, Sall. Jug. 25, 2; spolia, ornamenta, monumenta in instrumento et supellectile Verris nominabuntur, Verr. 2, 4, 44; ut instrumentum oratoris exponeret, De Or. II, 146.
Integumentum (intego) is so similar to tegumentum that it hardly needs separate treatment; however, it is used more frequently with an abstract meaning: istaec ego mihi semper habui aetati integumentum meae, Trin. 313; lanx cum integumentis, quae Iovi adposita fuit, Liv. 40, 59, 7.
Monumentum (moneo) is anything that serves as a reminder: statuam quae sit factis monumentum suis, Curc. 441; tum monumenta rerum gestarum oratori nota esse debere, De Or. I, 201.