I heard that company is trying to hamper Tofugu's success.
You should get rid of things that obstruct productivity.
I don’t understand why people try preventing aliens from reaching the earth.
This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means obstruct, so what is the verb vocab version? It's to obstruct.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you: Your woman friend (see radical) is trying to obstruct you. "Sama(n)tha!" (さまた) you yell. "Let me pass!"