SOME WORDS ENDING IN -ABLE
Reading edition
Words ending in silent e generally lose the e when -able is added, as—
adorable arguable desirable
excusable indispensable leisurable
But this rule is open to exceptions upon which authorities are not agreed. The following spellings are in The Oxford Dictionary, and must be followed:
advisable analysable ascribable atonable baptizable believable blameable bribable chaseable confinable conversable creatable datable debatable
defamable definable delineable dilatable dissolvable drivable endorsable evadable excisable exercisable finable forgivable framable giveable
hireable immovable improvable indispensable inflatable irreconcilable lapsable likeable linable liveable losable lovable malleable movable nameable
overcomable palatable partakable pleasable provable rateable rebukeable receivable reconcilable removable saleable solvable tameable tuneable unmistakable
If -able is preceded by ce or ge, the e should be retained, to preserve the soft sound of c or g, as—
bridgeable changeable chargeable knowledgeable lodgeable
manageable noticeable peaceable pledgeable serviceable
Words ending in double ee retain both letters, as—agreeable.
In words of English formation, a final consonant is usually doubled before -able, as—
admittable biddable clubbable conferrable deferrable
forgettable gettable incurrable rebuttable regrettable[2]