What is the meaning of -d?

Alternative form of -ed now only standard with words which end in -e, but historically permissable in all the same places as -ed.

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.

Marks ordinals written in digits when the final term of the spelled number is "second" or "third"

-th, -ness

your (second-person singular informal, single possession)

Second-person singular personal suffix:

1. Definite forms of transitive verbs (followed by a linking vowel in indicative present/past and subjunctive moods; with no linking vowel in conditional mood).

   Definite forms of transitive verbs (followed by a linking vowel in indicative present/past and subjunctive moods; with no linking vowel in conditional mood).

   Combined form of a covert (∅) allophone of -j (subjunctive suffix) and the regular suffix -(a/e)d (above), marking the short form of the above person of the definite subjunctive (attached directly to a verb stem).

   Forming conjugated infinitives (here: “for you to do sth”).

   Declined and postpositional forms of the second-person personal pronoun te (“you”).

   Originally, it was probably a diminutive suffix. In this sense, it is no longer productive. It can be found in place names, given names, and a few other words.

   A frequentative suffix or denoting the beginning of a process.

   Added to a cardinal number to form a fraction. It is used with a linking vowel, see -ad, -od, -ed, -öd.

   denotes an action performed on someone or something else (transitive suffix; allows for a direct complement patient, creating a patient-oriented verb)

   Alternative form of -th

   Alternative form of -the (ordinal suffix)

   A suffix denoting the third-person singular conjunct form of an animate intransitive verb (vai)

   A suffix denoting the third-person singular conjunct form of an animate intransitive verb with an object (vai+o)

   A suffix denoting the third-person singular conjunct form of a Type 3 inanimate transitive verb (vti3)

   A suffix denoting the third-person singular to first-person singular conjunct form of a transitive animate verb (vta) with Cw ending

   Suffix to form the past participle of weakly inflected verbs, to be used when the corresponding participle belongs with a common noun in indefinite singular form.

   Source: wiktionary.org