The sou-form of an i-adjective expresses that something seems to be in a certain way. It translates into sentences such as it looks red (akasou).
It is very easy to build. Just replace the last “i” of the adjective with a “sou”. So 楽しい (tanoshii, enjoyable) becomes 楽しそう (tanoshisou). Here are a few more examples to make it clear.
| Plain Form | Romaji | Meaning | sa Form | Romaji |
| 楽しい | tanoshii | enjoyable | 楽しそう | tanoshisou |
| 美しい | utsukushii | beautiful | 美しそう | utsukushisou |
| 新しい | atarashii | new | 新しそう | atarashisou |
| 赤い | akai | red | 赤そう | akasou |
| 大きい | ookii | big | 大きそう | ookisou |
Example sentences:
この料理はとても美味しそうです。
このりょうりはとてもおいしそうです。
kono ryouri wa totemo oishisou desu.
This dish looks very delicious.
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NIHONGO ICHIBAN 
Take a note that this isn’t true of all things. おいしそう – Looks Tasty. たのしそう – Looks Fun. かわいそう you would think means looks cute but it means Pathetic. Watch out!
かわそう means looks cute 😉
The adjective かわいい meaning cute would be written “かわいそう” but as かわいそう（可哀想）means poor, pitiful, sad, it is not really use in spoken language. You would rather say かわいらしい (kawairashii) which has the meaning of “look cute”.