You can't tell. L' is the form of le or lathat is used before a noun starting with a vowel, as in l'ange, the angel (masc.), and l'image, the picture (fem.).
High is haut (masc.), haute (fem.) in French
Greek is "grec" (masc.) or "grecque" (fem.) in French.
Furious is "furieux" (masc.), "furieuse" (fem.) in French.
"Destructive" in French is "destructif".
Bruyant (masc.), bruyante (fem.) means noisy in French.
Blue = bleu (masc.) bleue (fem.) White = blanc (masc.) blanche (fem.) Red = rouge (masc. and fem.)
it is dynamique (masc. and fem. singular) dymamiques (masc. and fem plural)
un kiwi (masc.)
(le) fruit is a masc. noun.
bleu (masc.), bleue (fem.)
Cher (Masc) Chere (Fem)
"Destructive" in French is "destructif".
"un dinosaure" is masculine in French
High is haut (masc.), haute (fem.) in French
Greek is "grec" (masc.) or "grecque" (fem.) in French.
Feminine in French is: féminin (masc.), féminine (fem.) "mot" est un mot (masc.) féminin (masc.)
Adoptif (masc.), adoptive (fem.).