1. a suffix used to form the superlative degree of adjectives and adverbs (e.g., fastest, slowest)
Usage: standard in English grammar; typically added to one- or two-syllable words
2. a suffix used to form the second-person singular present tense of verbs in archaic or biblical English (e.g., thou goest)
Usage: archaic; found in older texts and religious language

1. abbreviation for 'established' or 'estimate'
Usage: informal; used in writing and signage

Examples

• She is the fastest runner on the team.
• That is the coldest day of the winter.
• Thou goest to the market every morning.
• The store was est. in 1995.
• The project cost est. $50,000.