- ignition distributor
- ignore button
- illuminance level
- illuminated signs
- illuminating capacity
- illumination
- illumination photometer
- illustrated newspaper
- image display
- image header
- image setter
- imaginary
- imaginary hinge
- imbed
- imbibed
- imbrex
- imbricated plate
- imbrication
- Imhoff tank
- imitation stone
- immature
- immediate
- immediate replacement
- immediate settlement
- immersible pump
- immersion vibrator
- immure
- immurement
- impact coefficient
- impact compaction
- impact damage
- impact factor
- impact hammer
- impact printer
- impact sound
- impact strength
- impact stresses
- impact test
- impact wrench
- impairment
- impede
- impeller
- impeller pump
- imperial palace
- imperial roof
- impermeable
- impermeable formation
- impermeable rock
- impervious foundation
- impervious liner
- imperviousness
- imperviousness coefficient
- implausible
- implement
- implementation process
- implication
- implicit address
- import picture
- important part
- importation
- importer
- imposed load
- impost
- impost capital
- impotent
- impoundment
- impregnable
- impregnated sleeper
- impregnating apparatus
- impregnating machine
- impregnating tank
- impregnation
- impregnation resin
- impression
- imprison
- improve
- improved soil
- improvement
- improvisation draft
- improvise
- impulse frequency
- impulse pressure
- impulsion
- impulsive
- impulsive load
- impure clay
- in antis
- in brief
- in couple
- in suspension
- improved alignment
- improved land
- improved road
- improved wood
- impulse
- impulse response
- impulse sound
- impulse test
- impulsive force
- impurities