attitude toward, stance / behavior, manner

suspicious looking

precaution / caution

to be vigilant; to watch out

a man / a son

man / son / baron

a male person / (specifically) a man, an adult male / 男, 漢: (specifically) a manly man / a male lover / a manservant / a husband / (obsolete) an unmarried young man / (colloquial) homosexuality

a surname

a man / a husband / a male / something large, powerful, or otherwise masculine

a boy