it'd /itˈəd/ a contraction of it had or it would

• half-inch
• half-inched
• half-inches
• half-inching
• half-integer
• half-integers
• half-integral
• half-kirtle
• half-kirtles
• half-landing
• half-leather
• half-leathers
• half-length
• half-lengths
• half-life
• half-light
• half-lights
• halflin
• halfling
• halflings
• halflins
• half-lives
• half loaf
• half-loaf
• half-loaves