This is the 591st most frequent Estonian word.
tõsiselt
Seriously.
In this context, 'tõsiselt' acts as an interjection, similar to 'Honestly' or 'Seriously' in English, signaling the speaker's earnest or sincere proposal or statement.
Tõsiselt, sa peaksid seda kaaluma.
Seriously, you should consider it.
In this sentence, 'tõsiselt' means 'seriously', indicating the speaker's earnest approach or attitude towards the task.
Ma võtan selle ülesande tõsiselt.
I take this task seriously.
Here, 'tõsiselt' is used to intensify the adjective 'hea' (good), similar to 'really' or 'very' in English, adding emphasis.