-tusten
Finnish
Etymology
From -us + -ten, the initial -t- perhaps by analogy with -ttain.
Suffix
-tusten (front vowel harmony variant -tysten, linguistic notation -tUsten)
- Forms oppositive adverbs.
- kasvot (“face”) → kasvotusten (“face-to-face”)
- selkä (“back”) → selätysten (“back-to-back”)
- vieri (“side”) → vieretysten (“side-by-side”)