By mundialecter
Some special Sambahsa verbs are "nasal infix" verbs. They are ablautless, and their last vowel is IPA ə, after or before an n or an m. So, brinegh (IPA 'brinəg) = bring is one of those verbs. Before adding the past participle ending, the last e and the neighbouring m or n have to be deleted.
Let's say He has brought back those things. in Sambahsa. Remember, he is is. back, when meaning again, is tsay, the -ay being pronounced like I. those is ta and thing is ject (think at *object). For the past participle of brinegh, use the -en ending.