This is my “leeches” list of Chinese characters I have hard time getting into my head even with hard-core SRS regime. A leech is defined in Hacking Chinese blog post about leeches as

A leech is something that drains time from your studying and will keep doing so until you do something about it. The most essential example would be a piece of vocabulary, let’s say a character, that just refuses to stick in your mind.

My partly obsolete list (I’ve squashed some of them already and there a couple of new ones):

• 楼 - lǒu - hug
• 稠 - chóu - dense
• 劫 - jié - rob
• 澈 - chè - clear
• 焦 - jiāo - burnt, scorched example: 焦点 - focus point, 焦虑 - anxious
• 捏 - niē - to pinch, knead
• 盗 - dào - steal
• 羡 - xiàn - envy
• 蕴 - yùn - store
• 悦 - yuè - pleased
• 鄙 - bǐ - low, vulgar