

人の顔をじっと見つめるのは失礼ですよ。
彼女は窓の外を静かに見つめていました。
そんなに見つめないでよ、恥ずかしいから。
"みつめる(見つめる)" is in the lesson "Verbs 11" (Level 23), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.