IRREPROACHABLE—blameless, spotless.
IRRESISTIBLE—resistless, irrepressible.
IRRESOLUTE—wavering, undetermined, undecided, vacillating. (Determined.)
IRRITABLE—excitable, irascible, susceptible, sensitive. (Calm.)
IRRITATE—aggravate, worry, embitter, madden.
ISSUE, v.—emerge, rise, proceed, flow, spring.
ISSUE, n.—end, upshot, effect, result, offspring.
JADE—harass, weary, tire, worry.
JANGLE—wrangle, conflict, disagree.