To complete the sentence, you need an adjective that describes the appearance of snakes in a way that aligns with the sentiment of fear or danger. A suitable word could be "menacing."
Let's break down the thought process:
1. **Identify the context**: The speaker is expressing fear of snakes, mentioning both their danger and appearance.
2. **Choose an adjective**: You need an adjective that matches the fearful tone. Words like "menacing," "sinister," or "threatening" could fit.
3. **Consider the flow**: The sentence should read naturally and convey the intended emotion. "Menacing" works well because it suggests a threatening appearance.
Therefore, the sentence would be: "I’m frightened of snakes, I mean they’re dangerous and they look so menacing too."