-d

Meanings

1. Alternative form of -ed now only standard with words which end in -e, but historically permissable in all the same places as -ed.
2. An empty suffix, perhaps derived from the past-tense suffix above, added in some dialects to the present tense forms of some words which then add an additional -ed in the past tense.
3. Marks ordinals written in digits when the final term of the spelled number is "second" or "third"