

会社を辞めるって、本気で言ってるの?
来年から本気で日本語を勉強するつもりです。
冗談だよ、本気で怒らないで。
"ほんきで(本気で)" is in the lesson "Verbs 20" (Level 43), along with 10 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.