Which word from this sentence is not an adverb you measured the frame lengthwise and then fastened it securely?

Here's why:

* Adverbs modify verbs, adjectives, or other adverbs. They answer questions like "how," "when," "where," or "to what extent."

* "Lengthwise" is an adverb describing *how* you measured the frame.

* "Then" is an adverb describing *when* you fastened the frame.

* "Securely" is an adverb describing *how* you fastened the frame.

* "Frame" is a noun, the object of the verb "measured."