Adding Suffixes to Longer Words

NOTE: These rule-breakers apply to British spellings only.

If a word ends in one vowel and the letter l, we nearly always double the l when adding a vowel suffix, no matter which is stressed:

1st syllable stressed:	2nd syllable stressed:
travel + ing = travelling signal + ed = signalled quarrel + ing = quarrelling marvel + ous = marvellous	propel + ed = propelled enrol + ing = enrolling control + ed = controlled expel + ing = expelling
As before, words with two vowels do not double: conceal + ing = concealing prevail + ed = prevailed Do not double if the suffix is -ity, -ise or -ize: civil + ity = civility legal + ise = legalise formal + ize = formalize (Note: in most cases you can use either -ise or -ize.)