tosissaan

The inessive plural of tosi (tosissa) with a possessive suffix.

• IPA^(key): /ˈtosisːɑːn/, [ˈt̪o̞s̠is̠ːɑ̝ːn]
• Rhymes: -osisːɑːn
• Syllabification^(key): to‧sis‧saan
• Hyphenation^(key): to‧sis‧saan

tosissaan

1. serious(ly), in earnest [with (genitive +) suhteen ‘about’]

   Olen tosissani tämän suhteen.

   I am serious about this. / I mean it/business. / I'm not fooling around.

This adverb can be used predicatively with olla (“to be”); it can be used as an adjective in other positions (such as attributively) by using oleva. Like many other similar adverbs, it is inflected by person in standard Finnish, but in spoken colloquial Finnish, it often appears in the third-person form even when referring to the speaker or interlocutor: Olen tosissani and Olen tosissaan are both possible but the latter is considered nonstandard; likewise Ootsä tosissas? and Ootsä tosissaan? (“Are you serious?”)

• (seriously, in earnest): kunnolla, vakavissaan

• “tosissaan”, in Kielitoimiston sanakirja [Dictionary of Contemporary Finnish]‎^[1] (in Finnish) (online dictionary, continuously updated), Kotimaisten kielten keskuksen verkkojulkaisuja 35, Helsinki: Kotimaisten kielten tutkimuskeskus (Institute for the Languages of Finland), 2004–, retrieved 3 July 2023

• nastoissa