223

ideal

perfect

224

identical

the same

225

identifiable

recognizable

226

immense

enormous/huge

227

imminent

about to happen

228

immune to

unaffected by

229

implications

consequences

230

impressive

remarkable

231

improbable

unlikely

232

impulse to

push toward

233

in isolation

alone

234

in retrospect

in reconsidering the past/think in reconsideration

235

inadvertently

accidentally/unintentionally

236

inanimate

lifeless

237

incentive

motivation

238

inconclusive

not definitive

239

inconspicuous

not easily noticed

240

indefinitely

endlessly

241

indispensable

essential

242

inevitable

unavoidable

243

inevitably

necessarily

244

ingenious

clever

245

ingenuity

inventiveness

246

ingestion

swallowing

247

inhabitant

resident

248

inherent

built-in

249

inhospitable

unlikely

250

initially

at first

251

initiate

introduce/start/begin

252

innovation

change

253

insisting

stating forcefully

254

install

put in place

255

intact

whole/without breaking into pieces

256

integral

essential

257

integrated

combined

258

integration

unit

259

intend

plan

260

intense

extreme/strong

261

intermittently

periodically

262

interpret

understand

263

intricate

complex

264

intriguing

fascinating

265

intrusive

unwelcome

266

invariable

always

267

investigate

examine

268

isolated

widely separated