...There isn't an adjective form of every word. Onomatopoeia is only a noun, and it is in the context of the English language, so it's sorta 2nd person
Most verbs are regular verbs and to make the past tenses you add -ed. walk / walked, talk / talked, organise / organised. Some verbs are irregular this means you don;t add -ed to make the past tense...
These are contact arrangements that can be found on switches and relays. The form designation is fairly old and rarely used now.
Form A: a single, normally open contact that closes upon...