| Part of speech | verb |
|---|
| Indicative mood | |
|---|---|
| Present tense | Past tense |
| (I) weaken | (I) weakened |
| (thou) weakenest | (thou) weakenedst |
| (he) weakens, weakeneth | (he) weakened |
| (we) weaken | (we) weakened |
| (you) weaken | (you) weakened |
| (they) weaken | (they) weakened |
| Subjunctive mood | |
| Present tense | Past tense |
| (I) weaken | (I) weakened |
| (thou) weaken | (thou) weakened |
| (he) weaken | (he) weakened |
| (we) weaken | (we) weakened |
| (you) weaken | (you) weakened |
| (they) weaken | (they) weakened |
| Participles | |
| Present participle | Past participle |
| weakening | weakened |
| Afrikaans | verswak |
|---|---|
| Dutch | verzwakken |
| Esperanto | malfortiĝi; malplifortiĝi |
| German | schwächer werden |
| Saterland Frisian | ferslapje; ouswäkje; ferswäkje |
| Spanish | amainar |