Thorn
Briar, Wild Rose
noun
The kanji and the word are exactly the same. That means they share meanings as well.
いばら
This has the same reading as the kanji you learned, meaning you know the reading!
この程度の苦難で、茨の道を歩んでいるような人生だとか、よく言えるよね。
How dare you say you’ve dealt with walking down the thorny path in life just to keep up with their level of hardship.