If it's a word referring to a person or animal, it means he has a penis. If it's a word referring to an object with no natural gender, then it has no meaning other than complying with Hebrew grammar.
Most languages in the world have categories of nouns, called "noun classes". In Europe and the Middle East, there are usually only 2 noun classes: masculine and feminine. Some languages like German have 3. Swahili has 8!
These are artibrary groups that do not affect meaning.
dollar is masculine in Hebrew (דולר).
hatuna is feminine
Masculine: Ochel אוכל
sheleg (שלג) is masculine
mufkar (masculine) mufkeret (feminine)
merukaz (masculine) merukezet (feminine)
The closest word would be the word for "snake," which is nachash (× ×—×©). It is a masculine noun.
platypus is the name of a species as in masculine and feminine
hokmah is not a Hebrew word, but it's very close to Khokhmah (חוכמה) which means "wisdom", and is feminine.
masculine: metoraf (מטורף) feminine: metorefet (מטורפת)
Adjective: זהוב = Zahov (masculine) זהובה = Zehuva (feminine) זהובים = Zehuvim (masculine plural) זהובות = Zehuvot (feminine plural)
it depends on what you are describing...if it is a masculine singular item- yafeif it is a masculine plural- yafimif it is a feminine singular item- yafaand if it is feminine plural- yafot