This puzzle asks you to find the single category linking five clues: Electric current, Personal pronoun, Square root of -1, Iodine, and Roman numeral for 1. The answer is Different meanings of the letter “I”. The clues use the same word or related forms in different senses. The category describes those distinct meanings rather than a single object type. With only "Electric current", many categories could fit. Hold your first guess and watch what clue 2 eliminates. "Electric current" and "Personal pronoun" must share one repeatable link — not a coincidence between two words. By clue 3 ("Square root of -1"), "Different meanings of the letter “I”" should explain all three without bending meanings. "Iodine" strengthens "Different meanings of the letter “I”" rather than opening a new theory. The final clue ("Roman numeral for 1") confirms "Different meanings of the letter “I”" — if it still fits naturally, the category is locked. Use the Solution tab above for an interactive clue-by-clue walkthrough, or the Solved board tab for the complete answer at a glance.