Nothing. 'They' never has a suffix before it.
A suffix is a letter or group of letters added to the end of a word to make another word, such as -ly in quickly or -ness in sadness
'Happy' has no suffix. You could put a prefix on it though, as in 'unhappy', where 'un-' is the prefix.
A suffix is something you put at the beginning of a word and a suffix is something you put at the end of a word.
a prefix means before and a suffix means after :)
The prefix "de-" means to reverse or remove. The root "pres" refers to something put before or ahead. The suffix "-sion" denotes an action, process, or result.
carry or you can put port
The prefix "il-" can be added before "logical" to form the word "illogical," which means not logical or lacking reasoning.
Suffix is placed behind the base word.
Items which are under coverage can be put under the suffix.
a prefix is before the base word and a suffix is after the base word.
unusually
The suffix "pre-" means before. It is typically added to words to indicate that something comes before the main word or concept.
Teacherness is not even a suffix, nor a word.