• 木綿もめん — cotton cloth
• 綿花めんか — cotton plant
• 綿密めんみつ — detailed / precise
• 綿棒めんぼう — cotton swab
• 綿布めんぷ — cotton fabric
• 綿入わたいれ — padded clothing

綿 combines the radical 糸 (thread) with 咅, suggesting fibers bound together. This reflects cotton’s nature as a fluffy fiber spun into fabric. By extension, the kanji can also mean meticulous or continuous effort, as in 綿密 (precise).