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We can use a wildcards to either fill in a word ending or a specific character in a word.
Which symbols are used to designate a wildcard, are often different for different databases.
Unlimited Truncation - $ OR *
Place either $ or * at the end of a word with more than 3 letters before it, and all potential word ending will be searched. Be careful when using this as there will possibly be word endings that you hadn't thought of, that will bring up irrelevant search results.
treat$ = treat, treats, treatment, treated, treater, treatable, treaty, et al.
canad* = Canada, Canadian, Canadians, et al.
Limited Truncation - $n
Instead of allowing all possible word endings, replace n with the number of letters you would like it to fill in.
treat$1 = treaty, treats
sun$4 = sunroom, suntans, sunspot, sundaes, et al.
Mandated Wildcard - #
A # is used to replace an single unknown character. It's useful when there are vowel shifts between singular and plural words, or for differences in American and British spelling.
wom#n = woman, women
Optional Wildcard - ?
A ? is used to optionally replace a single character. This is useful for differences in American and British spelling.
counsel?ing = counselling, counseling
p?ediatric = paediatric, pediatric
Unlimited Truncation
Place an * at the end of a word with more than 3 letters before it, and all potential word ending will be searched. Be careful when using this as there will possibly be word endings that you hadn't thought of, that will bring up irrelevant search results.
Publi* = publish, public, publicize, publican, publication, et al.
Unlimited Wildcard
Use an * in the middle letters to fill in all possible letters that work in between. This works best with at least 3 letters.
he*one = headphone, headstone, hearthstone, et al.
Mandated Wildcard
A ? is used to replace an single unknown character. It's useful when there are vowel shifts between singular and plural words, or for differences in American and British spelling.
organi?e = organize, organise
licen?e = licence, license
Optional Wildcard
A # is used to optionally replace a single character. This is useful for differences in American and British spelling.
labo#r = labour, labor