グラム（グラム、guramu）
- gram

The word グラム, written in katakana, represents "gram" which is a unit of mass or weight in the metric system. It is used to measure the weight of various objects, substances, or ingredients. It is a fundamental unit used widely in science, cooking, and everyday life for quantifying mass.

⚫︎このレシピでは、小麦粉を200グラム使います。 Translation: This recipe uses 200 grams of flour. ⚫︎あのリンゴは150グラムあります。 Translation: That apple weighs 150 grams. ⚫︎薬は1日に3グラムまでです。 Translation: The medication is up to 3 grams per day.

グラム is used in various contexts where weight needs to be specified. You'll commonly encounter it when: ⚫︎ Talking about the weight of food items (e.g., in recipes or at the grocery store). ⚫︎ Discussing the weight of objects in general. ⚫︎ Referring to the dosage of medicine. ⚫︎ In scientific contexts (e.g., in chemistry or physics experiments). The word is usually used after a number to specify the weight, like 50グラム (fifty grams).

グラム is written in katakana, as it's a loanword from a foreign language (English). The katakana form is always グラム. There are no other ways to write this word in Japanese.

There aren't direct synonyms for "gram" in Japanese, as it's a specific unit. You could use other units of mass, like: ⚫︎ キログラム（kilogram): Used for larger weights (1000 グラム) ⚫︎ ミリグラム（milligram): Used for very small weights (1/1000 of a グラム)

Since グラム is a unit of measurement, it doesn't have a direct antonym. However, you could consider the concept of "lightness" or "heaviness" as opposites. But these concepts are expressed through adjective phrases rather than a single word antonym.

このチョコレートは100グラム入りです。 ・Translation: This chocolate bar is 100 grams. ・Explanation: This sentence uses グラム to specify the weight of the chocolate.

赤ちゃんは生まれたとき、3000グラムでした。 ・Translation: The baby weighed 3000 grams at birth. ・Explanation: This sentence uses グラム to describe the baby's weight at birth.

The word グラム comes directly from the English word "gram", which in turn originates from the French word "gramme." It was adopted into Japanese to represent the metric unit of mass.