Ineffectually and Inessential

Ineffectually adverb - In an ineffectual manner.

Inessential and ineffectually are semantically related. In some cases you can use "Inessential" instead an adjective "Ineffectually".

Inessential adjective - Not needed by the circumstances or to accomplish an end.

Ineffectually and inessential are semantically related. Sometimes you can replace term "Ineffectually" with "Inessential", this adjectives are similar.