So as to resist displacement or removal; in order to avoid capture, invasion, or assault; so as to prevent access or escape; firmly, solidly…

In a strong, fixed position; in a firm or definite way; firmly, fixedly.

Strongly, stoutly, firmly; violently; harshly, severely.

Firmly, securely; tightly.

In a strong, fixed position; in a firm or definite way; firmly, fixedly; immovably.

adv. = steadfastly, adv. Obsolete.

Strongly, stoutly, valiantly, severely, etc. (see the senses of stith, adj.).

Firmly, unyieldingly.

On root; hence, rooted, firm.

With little possibility of movement; so as not easily to be shaken or dislodged; fixedly, securely, strongly; steadily, immovably.

Securely, tightly; firmly, solidly.

Firmly, strongly, fixedly; soundly. Obsolete.

Firmly, tightly, closely. Obsolete.

In physical sense: Steadily, firmly, so as not to be shaken or displaced. rare.

Modifying a non-participial adjective: extremely, very. Obsolete.

Stoutly, strongly, etc.

Solidly.

Very tightly, firmly, or closely. Somewhat rare after 16th cent.

In a secure manner; securely, safely; easily.

Securely; without risk of falling or shifting.

So as to be fixed or firm; firmly, securely.

Firmly, closely, securely; so as not to allow any movement: = tightly, adv. 3.

In a fixed or stable manner; firmly.

Firmly, unyieldingly.

in an inexcussable manner, so as not to be shaken out.

In combination with participial adjective (used attributively), as tightly-clenched, tightly-corsetted, tightly-reined, tightly-wrapped, etc.